21131431212332 has 24 divisors (see below), whose sum is σ = 42304337322240. Its totient is φ = 9047440184400.

The previous prime is 21131431212319. The next prime is 21131431212371. The reversal of 21131431212332 is 23321213413112.

It is a junction number, because it is equal to n+sod(n) for n = 21131431212295 and 21131431212304.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 370282544 + ... + 370339607.

It is an arithmetic number, because the mean of its divisors is an integer number (1762680721760).

Almost surely, 2^{21131431212332} is an apocalyptic number.

It is an amenable number.

21131431212332 is an abundant number, since it is smaller than the sum of its proper divisors (21172906109908).

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

21131431212332 is a wasteful number, since it uses less digits than its factorization.

21131431212332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740623181 (or 740623179 counting only the distinct ones).

The product of its digits is 5184, while the sum is 29.

Adding to 21131431212332 its reverse (23321213413112), we get a palindrome (44452644625444).

The spelling of 21131431212332 in words is "twenty-one trillion, one hundred thirty-one billion, four hundred thirty-one million, two hundred twelve thousand, three hundred thirty-two".