2123021100031 has 16 divisors (see below), whose sum is σ = 2365241558400. Its totient is φ = 1892077786368.

The previous prime is 2123021100017. The next prime is 2123021100071. The reversal of 2123021100031 is 1300011203212.

It is a cyclic number.

It is not a de Polignac number, because 2123021100031 - 2⁹ = 2123021099519 is a prime.

It is a super-2 number, since 2×2123021100031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2123021099978 and 2123021100014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123021100001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16557690 + ... + 16685416.

It is an arithmetic number, because the mean of its divisors is an integer number (147827597400).

Almost surely, 2^{2123021100031} is an apocalyptic number.

2123021100031 is a deficient number, since it is larger than the sum of its proper divisors (242220458369).

2123021100031 is a wasteful number, since it uses less digits than its factorization.

2123021100031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171858.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 2123021100031 its reverse (1300011203212), we get a palindrome (3423032303243).

The spelling of 2123021100031 in words is "two trillion, one hundred twenty-three billion, twenty-one million, one hundred thousand, thirty-one".