21223401032 has 16 divisors (see below), whose sum is σ = 40084345260. Its totient is φ = 10534242304.

The previous prime is 21223400969. The next prime is 21223401049. The reversal of 21223401032 is 23010432212.

It can be written as a sum of positive squares in 2 ways, for example, as 18134931556 + 3088469476 = 134666^2 + 55574^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21223400995 and 21223401013.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9681113 + ... + 9683304.

Almost surely, 2^21223401032 is an apocalyptic number.

It is an amenable number.

21223401032 is a deficient number, since it is larger than the sum of its proper divisors (18860944228).

21223401032 is a wasteful number, since it uses less digits than its factorization.

21223401032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19364560 (or 19364556 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21223401032 its reverse (23010432212), we get a palindrome (44233833244).

The spelling of 21223401032 in words is "twenty-one billion, two hundred twenty-three million, four hundred one thousand, thirty-two".