12221122021122 has 16 divisors (see below), whose sum is σ = 27933993191232. Its totient is φ = 3491749148880.

The previous prime is 12221122021111. The next prime is 12221122021133. The reversal of 12221122021122 is 22112022112221.

It is an interprime number because it is at equal distance from previous prime (12221122021111) and next prime (12221122021133).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145489547829 + ... + 145489547912.

It is an arithmetic number, because the mean of its divisors is an integer number (1745874574452).

Almost surely, 2^{12221122021122} is an apocalyptic number.

12221122021122 is an abundant number, since it is smaller than the sum of its proper divisors (15712871170110).

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

12221122021122 is a wasteful number, since it uses less digits than its factorization.

12221122021122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290979095753.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 12221122021122 its reverse (22112022112221), we get a palindrome (34333144133343).

The spelling of 12221122021122 in words is "twelve trillion, two hundred twenty-one billion, one hundred twenty-two million, twenty-one thousand, one hundred twenty-two".