22121211022110 has 128 divisors (see below), whose sum is σ = 61634732544000. Its totient is φ = 5635173113856.

The previous prime is 22121211022063. The next prime is 22121211022139. The reversal of 22121211022110 is 1122011212122.

22121211022110 is a `hidden beast` number, since 221 + 2 + 1 + 211 + 0 + 221 + 10 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2459371 + ... + 7091609.

It is an arithmetic number, because the mean of its divisors is an integer number (481521348000).

Almost surely, 2^{22121211022110} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22121211022110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30817366272000).

22121211022110 is an abundant number, since it is smaller than the sum of its proper divisors (39513521521890).

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

22121211022110 is a wasteful number, since it uses less digits than its factorization.

22121211022110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4633047 (or 4633041 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 22121211022110 its reverse (1122011212122), we get a palindrome (23243222234232).

The spelling of 22121211022110 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred eleven million, twenty-two thousand, one hundred ten".