202102120031 has 16 divisors (see below), whose sum is σ = 242409383424. Its totient is φ = 164740814304.

The previous prime is 202102120027. The next prime is 202102120141. The reversal of 202102120031 is 130021201202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 202102120031 - 2² = 202102120027 is a prime.

It is a super-2 number, since 2×202102120031² (a number of 23 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 = 202102119988 and 202102120015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202102120021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3600161 + ... + 3655866.

It is an arithmetic number, because the mean of its divisors is an integer number (15150586464).

Almost surely, 2^202102120031 is an apocalyptic number.

202102120031 is a deficient number, since it is larger than the sum of its proper divisors (40307263393).

202102120031 is a wasteful number, since it uses less digits than its factorization.

202102120031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7256230.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 202102120031 its reverse (130021201202), we get a palindrome (332123321233).

The spelling of 202102120031 in words is "two hundred two billion, one hundred two million, one hundred twenty thousand, thirty-one".