21002001202110 has 32 divisors (see below), whose sum is σ = 50411168501760. Its totient is φ = 5599826363168.

The previous prime is 21002001202057. The next prime is 21002001202207. The reversal of 21002001202110 is 1120210020012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43964142 + ... + 44439281.

It is an arithmetic number, because the mean of its divisors is an integer number (1575349015680).

Almost surely, 2^{21002001202110} is an apocalyptic number.

21002001202110 is an abundant number, since it is smaller than the sum of its proper divisors (29409167299650).

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

21002001202110 is a wasteful number, since it uses less digits than its factorization.

21002001202110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88411352.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21002001202110 its reverse (1120210020012), we get a palindrome (22122211222122).

The spelling of 21002001202110 in words is "twenty-one trillion, two billion, one million, two hundred two thousand, one hundred ten".