11401231431 has 16 divisors (see below), whose sum is σ = 15673933440. Its totient is φ = 7367374560.

The previous prime is 11401231427. The next prime is 11401231433. The reversal of 11401231431 is 13413210411.

It is not a de Polignac number, because 11401231431 - 2² = 11401231427 is a prime.

It is a super-2 number, since 2×11401231431² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11401231398 and 11401231407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11401231433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 320436 + ... + 354233.

It is an arithmetic number, because the mean of its divisors is an integer number (979620840).

Almost surely, 2^11401231431 is an apocalyptic number.

11401231431 is a deficient number, since it is larger than the sum of its proper divisors (4272702009).

11401231431 is a wasteful number, since it uses less digits than its factorization.

11401231431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674846.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 11401231431 its reverse (13413210411), we get a palindrome (24814441842).

The spelling of 11401231431 in words is "eleven billion, four hundred one million, two hundred thirty-one thousand, four hundred thirty-one".