21021202100012 has 24 divisors (see below), whose sum is σ = 37390454357760. Its totient is φ = 10338217752960.

The previous prime is 21021202099973. The next prime is 21021202100021. The reversal of 21021202100012 is 21000120212012.

It is a self number, because there is not a number n which added to its sum of digits gives 21021202100012.

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, 44536064 + ... + 45005592.

It is an arithmetic number, because the mean of its divisors is an integer number (1557935598240).

Almost surely, 2^{21021202100012} is an apocalyptic number.

It is an amenable number.

21021202100012 is a deficient number, since it is larger than the sum of its proper divisors (16369252257748).

21021202100012 is a wasteful number, since it uses less digits than its factorization.

21021202100012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653081 (or 653079 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21021202100012 its reverse (21000120212012), we get a palindrome (42021322312024).

The spelling of 21021202100012 in words is "twenty-one trillion, twenty-one billion, two hundred two million, one hundred thousand, twelve".