21002020022010 has 64 divisors (see below), whose sum is σ = 52007985695232. Its totient is φ = 5424869185536.

The previous prime is 21002020021991. The next prime is 21002020022069. The reversal of 21002020022010 is 1022002020012.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76641837 + ... + 76915376.

It is an arithmetic number, because the mean of its divisors is an integer number (812624776488).

Almost surely, 2^{21002020022010} is an apocalyptic number.

21002020022010 is an abundant number, since it is smaller than the sum of its proper divisors (31005965673222).

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

21002020022010 is a wasteful number, since it uses less digits than its factorization.

21002020022010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153557367.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21002020022010 its reverse (1022002020012), we get a palindrome (22024022042022).

The spelling of 21002020022010 in words is "twenty-one trillion, two billion, twenty million, twenty-two thousand, ten".