123012222020 has 24 divisors (see below), whose sum is σ = 273521294424. Its totient is φ = 46310483456.

The previous prime is 123012221999. The next prime is 123012222041. The reversal of 123012222020 is 20222210321.

It is an interprime number because it is at equal distance from previous prime (123012221999) and next prime (123012222041).

It can be written as a sum of positive squares in 4 ways, for example, as 33146571844 + 89865650176 = 182062^2 + 299776^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 123012222020.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180899987 + ... + 180900666.

It is an arithmetic number, because the mean of its divisors is an integer number (11396720601).

Almost surely, 2^123012222020 is an apocalyptic number.

123012222020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123012222020 is an abundant number, since it is smaller than the sum of its proper divisors (150509072404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123012222020 is a wasteful number, since it uses less digits than its factorization.

123012222020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361800679 (or 361800677 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 123012222020 its reverse (20222210321), we get a palindrome (143234432341).

The spelling of 123012222020 in words is "one hundred twenty-three billion, twelve million, two hundred twenty-two thousand, twenty".