2312221023021 has 64 divisors (see below), whose sum is σ = 3970180988928. Its totient is φ = 1163425621248.

The previous prime is 2312221023017. The next prime is 2312221023037. The reversal of 2312221023021 is 1203201222132.

It is not a de Polignac number, because 2312221023021 - 2² = 2312221023017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2312221023521) 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, 1802695 + ... + 2806091.

It is an arithmetic number, because the mean of its divisors is an integer number (62034077952).

Almost surely, 2^{2312221023021} is an apocalyptic number.

2312221023021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2312221023021 is a deficient number, since it is larger than the sum of its proper divisors (1657959965907).

2312221023021 is a wasteful number, since it uses less digits than its factorization.

2312221023021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003810.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 2312221023021 its reverse (1203201222132), we get a palindrome (3515422245153).

The spelling of 2312221023021 in words is "two trillion, three hundred twelve billion, two hundred twenty-one million, twenty-three thousand, twenty-one".