21012202022110 has 64 divisors (see below), whose sum is σ = 41610438761472. Its totient is φ = 7591004136576.

The previous prime is 21012202022107. The next prime is 21012202022177. The reversal of 21012202022110 is 1122020221012.

It is a happy number.

It is a congruent number.

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, 19936429 + ... + 20963911.

It is an arithmetic number, because the mean of its divisors is an integer number (650163105648).

Almost surely, 2^{21012202022110} is an apocalyptic number.

21012202022110 is a deficient number, since it is larger than the sum of its proper divisors (20598236739362).

21012202022110 is a wasteful number, since it uses less digits than its factorization.

21012202022110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030897.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21012202022110 its reverse (1122020221012), we get a palindrome (22134222243122).

The spelling of 21012202022110 in words is "twenty-one trillion, twelve billion, two hundred two million, twenty-two thousand, one hundred ten".