2102402020031 has 16 divisors (see below), whose sum is σ = 2219909849088. Its totient is φ = 1988136964800.

The previous prime is 2102402020021. The next prime is 2102402020039. The reversal of 2102402020031 is 1300202042012.

It is a cyclic number.

It is not a de Polignac number, because 2102402020031 - 2³⁰ = 2101328278207 is a prime.

It is a super-2 number, since 2×2102402020031² (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 = 2102402019991 and 2102402020009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102402020039) 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, 224030 + ... + 2062763.

It is an arithmetic number, because the mean of its divisors is an integer number (138744365568).

Almost surely, 2^{2102402020031} is an apocalyptic number.

2102402020031 is a deficient number, since it is larger than the sum of its proper divisors (117507829057).

2102402020031 is a wasteful number, since it uses less digits than its factorization.

2102402020031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2287502.

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

Adding to 2102402020031 its reverse (1300202042012), we get a palindrome (3402604062043).

The spelling of 2102402020031 in words is "two trillion, one hundred two billion, four hundred two million, twenty thousand, thirty-one".