12213550442045 has 16 divisors (see below), whose sum is σ = 14859087363120. Its totient is φ = 9635659513344.

The previous prime is 12213550442017. The next prime is 12213550442069. The reversal of 12213550442045 is 54024405531221.

It can be written as a sum of positive squares in 8 ways, for example, as 14443472761 + 12199106969284 = 120181^2 + 3492722^2 .

It is a cyclic number.

It is not a de Polignac number, because 12213550442045 - 2³⁴ = 12196370572861 is a prime.

It is a super-2 number, since 2×12213550442045² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 329651 + ... + 4953359.

It is an arithmetic number, because the mean of its divisors is an integer number (928692960195).

Almost surely, 2^{12213550442045} is an apocalyptic number.

It is an amenable number.

12213550442045 is a deficient number, since it is larger than the sum of its proper divisors (2645536921075).

12213550442045 is an equidigital number, since it uses as much as digits as its factorization.

12213550442045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4631024.

The product of its (nonzero) digits is 192000, while the sum is 38.

Adding to 12213550442045 its reverse (54024405531221), we get a palindrome (66237955973266).

The spelling of 12213550442045 in words is "twelve trillion, two hundred thirteen billion, five hundred fifty million, four hundred forty-two thousand, forty-five".