12220100021 has 16 divisors (see below), whose sum is σ = 13638332160. Its totient is φ = 10881216000.

The previous prime is 12220100003. The next prime is 12220100023. The reversal of 12220100021 is 12000102221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12220100021 - 2²⁶ = 12152991157 is a prime.

It is a super-3 number, since 3×12220100021³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12220099975 and 12220100011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220100023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217385 + ... + 267761.

It is an arithmetic number, because the mean of its divisors is an integer number (852395760).

Almost surely, 2^12220100021 is an apocalyptic number.

It is an amenable number.

12220100021 is a deficient number, since it is larger than the sum of its proper divisors (1418232139).

12220100021 is a wasteful number, since it uses less digits than its factorization.

12220100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51164.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 12220100021 its reverse (12000102221), we get a palindrome (24220202242).

The spelling of 12220100021 in words is "twelve billion, two hundred twenty million, one hundred thousand, twenty-one".