11231434401240 has 128 divisors (see below), whose sum is σ = 33883499520000. Its totient is φ = 2978278668288.

The previous prime is 11231434401233. The next prime is 11231434401241. The reversal of 11231434401240 is 4210443413211.

It is a happy number.

It is a super-2 number, since 2×11231434401240² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 11231434401198 and 11231434401207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11231434401241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14960361 + ... + 15693159.

It is an arithmetic number, because the mean of its divisors is an integer number (264714840000).

Almost surely, 2^{11231434401240} is an apocalyptic number.

11231434401240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11231434401240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16941749760000).

11231434401240 is an abundant number, since it is smaller than the sum of its proper divisors (22652065118760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11231434401240 is a wasteful number, since it uses less digits than its factorization.

11231434401240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733529 (or 733525 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

Adding to 11231434401240 its reverse (4210443413211), we get a palindrome (15441877814451).

The spelling of 11231434401240 in words is "eleven trillion, two hundred thirty-one billion, four hundred thirty-four million, four hundred one thousand, two hundred forty".