123212320323021 has 64 divisors (see below), whose sum is σ = 198603659842560. Its totient is φ = 75180145904640.

The previous prime is 123212320323007. The next prime is 123212320323047. The reversal of 123212320323021 is 120323023212321.

123212320323021 is a `hidden beast` number, since 1 + 2 + 3 + 2 + 1 + 2 + 320 + 32 + 302 + 1 = 666.

It is not a de Polignac number, because 123212320323021 - 2¹⁵ = 123212320290253 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123212320323221) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 29944476 + ... + 33809706.

It is an arithmetic number, because the mean of its divisors is an integer number (3103182185040).

Almost surely, 2^{123212320323021} is an apocalyptic number.

It is an amenable number.

123212320323021 is a deficient number, since it is larger than the sum of its proper divisors (75391339519539).

123212320323021 is a wasteful number, since it uses less digits than its factorization.

123212320323021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3867171 (or 3867165 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 123212320323021 its reverse (120323023212321), we get a palindrome (243535343535342).

The spelling of 123212320323021 in words is "one hundred twenty-three trillion, two hundred twelve billion, three hundred twenty million, three hundred twenty-three thousand, twenty-one".