12211012121022 has 160 divisors (see below), whose sum is σ = 32148044669664. Its totient is φ = 3415368499200.

The previous prime is 12211012121003. The next prime is 12211012121023. The reversal of 12211012121022 is 22012121011221.

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

It is a junction number, because it is equal to n+sod(n) for n = 12211012120986 and 12211012121004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211012121023) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 478156638 + ... + 478182174.

Almost surely, 2^{12211012121022} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12211012121022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16074022334832).

12211012121022 is an abundant number, since it is smaller than the sum of its proper divisors (19937032548642).

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

12211012121022 is a wasteful number, since it uses less digits than its factorization.

12211012121022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46216 (or 46207 counting only the distinct ones).

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

Adding to 12211012121022 its reverse (22012121011221), we get a palindrome (34223133132243).

The spelling of 12211012121022 in words is "twelve trillion, two hundred eleven billion, twelve million, one hundred twenty-one thousand, twenty-two".