1211404113432 has 128 divisors (see below), whose sum is σ = 3571669080000. Its totient is φ = 379118665728.

The previous prime is 1211404113421. The next prime is 1211404113523. The reversal of 1211404113432 is 2343114041121.

It is a happy number.

1211404113432 is a `hidden beast` number, since 1 + 2 + 114 + 0 + 4 + 113 + 432 = 666.

It is a super-3 number, since 3×1211404113432³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1211404113396 and 1211404113405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1098544 + ... + 1905152.

Almost surely, 2^{1211404113432} is an apocalyptic number.

1211404113432 is a gapful number since it is divisible by the number (12) 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 1211404113432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1785834540000).

1211404113432 is an abundant number, since it is smaller than the sum of its proper divisors (2360264966568).

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

1211404113432 is a wasteful number, since it uses less digits than its factorization.

1211404113432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807050 (or 807040 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

Adding to 1211404113432 its reverse (2343114041121), we get a palindrome (3554518154553).

The spelling of 1211404113432 in words is "one trillion, two hundred eleven billion, four hundred four million, one hundred thirteen thousand, four hundred thirty-two".