12210021123 has 4 divisors (see below), whose sum is σ = 16280028168. Its totient is φ = 8140014080.

The previous prime is 12210021073. The next prime is 12210021151. The reversal of 12210021123 is 32112001221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12210021123 - 2⁶ = 12210021059 is a prime.

It is a super-2 number, since 2×12210021123² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12210021323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2035003518 + ... + 2035003523.

It is an arithmetic number, because the mean of its divisors is an integer number (4070007042).

Almost surely, 2^12210021123 is an apocalyptic number.

12210021123 is a deficient number, since it is larger than the sum of its proper divisors (4070007045).

12210021123 is an equidigital number, since it uses as much as digits as its factorization.

12210021123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4070007044.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 12210021123 its reverse (32112001221), we get a palindrome (44322022344).

The spelling of 12210021123 in words is "twelve billion, two hundred ten million, twenty-one thousand, one hundred twenty-three".