20021221022110 has 128 divisors (see below), whose sum is σ = 46301640422400. Its totient is φ = 6178593456000.

The previous prime is 20021221022107. The next prime is 20021221022111. The reversal of 20021221022110 is 1122012212002.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021221022111) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1183777 + ... + 6437683.

It is an arithmetic number, because the mean of its divisors is an integer number (361731565800).

Almost surely, 2^{20021221022110} is an apocalyptic number.

20021221022110 is an abundant number, since it is smaller than the sum of its proper divisors (26280419400290).

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

20021221022110 is a wasteful number, since it uses less digits than its factorization.

20021221022110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5254047 (or 5254033 counting only the distinct ones).

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

Adding to 20021221022110 its reverse (1122012212002), we get a palindrome (21143233234112).

The spelling of 20021221022110 in words is "twenty trillion, twenty-one billion, two hundred twenty-one million, twenty-two thousand, one hundred ten".