21122020120110 has 256 divisors, whose sum is σ = 62888967364608. Its totient is φ = 4420982592000.

The previous prime is 21122020120093. The next prime is 21122020120127. The reversal of 21122020120110 is 1102102022112.

It is an interprime number because it is at equal distance from previous prime (21122020120093) and next prime (21122020120127).

It is a super-2 number, since 2×21122020120110² (a number of 27 digits) contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21122020120110.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1268505285 + ... + 1268521935.

It is an arithmetic number, because the mean of its divisors is an integer number (245660028768).

Almost surely, 2^{21122020120110} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21122020120110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31444483682304).

21122020120110 is an abundant number, since it is smaller than the sum of its proper divisors (41766947244498).

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

21122020120110 is a wasteful number, since it uses less digits than its factorization.

21122020120110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20359.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21122020120110 its reverse (1102102022112), we get a palindrome (22224122142222).

The spelling of 21122020120110 in words is "twenty-one trillion, one hundred twenty-two billion, twenty million, one hundred twenty thousand, one hundred ten".