2100020200031 has 24 divisors (see below), whose sum is σ = 2388701622384. Its totient is φ = 1835033667840.

The previous prime is 2100020200009. The next prime is 2100020200127. The reversal of 2100020200031 is 1300020200012.

It is a happy number.

It is not a de Polignac number, because 2100020200031 - 2¹⁸ = 2100019937887 is a prime.

It is a super-2 number, since 2×2100020200031² (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 = 2100020199985 and 2100020200021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100023200031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5914316 + ... + 6259326.

It is an arithmetic number, because the mean of its divisors is an integer number (99529234266).

Almost surely, 2^{2100020200031} is an apocalyptic number.

2100020200031 is a deficient number, since it is larger than the sum of its proper divisors (288681422353).

2100020200031 is a wasteful number, since it uses less digits than its factorization.

2100020200031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346359 (or 346340 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 2100020200031 its reverse (1300020200012), we get a palindrome (3400040400043).

The spelling of 2100020200031 in words is "two trillion, one hundred billion, twenty million, two hundred thousand, thirty-one".