12122021221011 has 72 divisors (see below), whose sum is σ = 20092270816800. Its totient is φ = 7026802997760.

The previous prime is 12122021220961. The next prime is 12122021221049. The reversal of 12122021221011 is 11012212022121.

12122021221011 is a `hidden beast` number, since 1 + 21 + 220 + 212 + 210 + 1 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-12122021221011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12122021221811) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1542991 + ... + 5159928.

It is an arithmetic number, because the mean of its divisors is an integer number (279059316900).

Almost surely, 2^{12122021221011} is an apocalyptic number.

12122021221011 is a deficient number, since it is larger than the sum of its proper divisors (7970249595789).

12122021221011 is a wasteful number, since it uses less digits than its factorization.

12122021221011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6703021 (or 6703005 counting only the distinct ones).

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

Adding to 12122021221011 its reverse (11012212022121), we get a palindrome (23134233243132).

The spelling of 12122021221011 in words is "twelve trillion, one hundred twenty-two billion, twenty-one million, two hundred twenty-one thousand, eleven".