21000112504252 has 24 divisors (see below), whose sum is σ = 42000325164896. Its totient is φ = 9000026754048.

The previous prime is 21000112504213. The next prime is 21000112504277. The reversal of 21000112504252 is 25240521100012.

It is a congruent number.

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, 18239308 + ... + 19356460.

Almost surely, 2^{21000112504252} is an apocalyptic number.

It is an amenable number.

21000112504252 is an abundant number, since it is smaller than the sum of its proper divisors (21000212660644).

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

21000112504252 is a wasteful number, since it uses less digits than its factorization.

21000112504252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1788517 (or 1788515 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 21000112504252 its reverse (25240521100012), we get a palindrome (46240633604264).

The spelling of 21000112504252 in words is "twenty-one trillion, one hundred twelve million, five hundred four thousand, two hundred fifty-two".