21201022022010 has 64 divisors (see below), whose sum is σ = 50911631505792. Its totient is φ = 5650364595456.

The previous prime is 21201022022009. The next prime is 21201022022017. The reversal of 21201022022010 is 1022022010212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (21201022022017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 529515712 + ... + 529555748.

It is an arithmetic number, because the mean of its divisors is an integer number (795494242278).

Almost surely, 2^{21201022022010} is an apocalyptic number.

21201022022010 is an abundant number, since it is smaller than the sum of its proper divisors (29710609483782).

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

21201022022010 is a wasteful number, since it uses less digits than its factorization.

21201022022010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49727.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21201022022010 its reverse (1022022010212), we get a palindrome (22223044032222).

The spelling of 21201022022010 in words is "twenty-one trillion, two hundred one billion, twenty-two million, twenty-two thousand, ten".