1223724172020 has 96 divisors (see below), whose sum is σ = 3916651511808. Its totient is φ = 279655942272.

The previous prime is 1223724172003. The next prime is 1223724172037. The reversal of 1223724172020 is 202714273221.

It is an interprime number because it is at equal distance from previous prime (1223724172003) and next prime (1223724172037).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1992109 + ... + 2532971.

It is an arithmetic number, because the mean of its divisors is an integer number (40798453248).

Almost surely, 2^{1223724172020} is an apocalyptic number.

1223724172020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223724172020 is an abundant number, since it is smaller than the sum of its proper divisors (2692927339788).

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

1223724172020 is a wasteful number, since it uses less digits than its factorization.

1223724172020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546269 (or 546267 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 33.

The spelling of 1223724172020 in words is "one trillion, two hundred twenty-three billion, seven hundred twenty-four million, one hundred seventy-two thousand, twenty".