21431122204002 has 48 divisors (see below), whose sum is σ = 49861277907552. Its totient is φ = 6123040714560.

The previous prime is 21431122203991. The next prime is 21431122204043. The reversal of 21431122204002 is 20040222113412.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12722638 + ... + 14308310.

It is an arithmetic number, because the mean of its divisors is an integer number (1038776623074).

Almost surely, 2^{21431122204002} is an apocalyptic number.

21431122204002 is an abundant number, since it is smaller than the sum of its proper divisors (28430155703550).

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

21431122204002 is a wasteful number, since it uses less digits than its factorization.

21431122204002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1631663 (or 1631656 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21431122204002 its reverse (20040222113412), we get a palindrome (41471344317414).

The spelling of 21431122204002 in words is "twenty-one trillion, four hundred thirty-one billion, one hundred twenty-two million, two hundred four thousand, two".