22121011101210 has 128 divisors (see below), whose sum is σ = 64867605663744. Its totient is φ = 4712603673600.

The previous prime is 22121011101209. The next prime is 22121011101253. The reversal of 22121011101210 is 1210111012122.

It is a happy number.

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 22121011101210.

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, 29711716 + ... + 30447135.

It is an arithmetic number, because the mean of its divisors is an integer number (506778169248).

Almost surely, 2^{22121011101210} is an apocalyptic number.

22121011101210 is an abundant number, since it is smaller than the sum of its proper divisors (42746594562534).

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

22121011101210 is a wasteful number, since it uses less digits than its factorization.

22121011101210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60158988.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 22121011101210 its reverse (1210111012122), we get a palindrome (23331122113332).

It can be divided in two parts, 2 and 2121011101210, that added together give a palindrome (2121011101212).

The spelling of 22121011101210 in words is "twenty-two trillion, one hundred twenty-one billion, eleven million, one hundred one thousand, two hundred ten".