202131210042 has 24 divisors (see below), whose sum is σ = 439616178144. Its totient is φ = 67120881864.

The previous prime is 202131209983. The next prime is 202131210053. The reversal of 202131210042 is 240012131202.

It is a happy number.

202131210042 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 202131209997 and 202131210024.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21344148 + ... + 21353615.

It is an arithmetic number, because the mean of its divisors is an integer number (18317340756).

Almost surely, 2^202131210042 is an apocalyptic number.

202131210042 is an abundant number, since it is smaller than the sum of its proper divisors (237484968102).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

202131210042 is a wasteful number, since it uses less digits than its factorization.

202131210042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42698034 (or 42698031 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 202131210042 its reverse (240012131202), we get a palindrome (442143341244).

The spelling of 202131210042 in words is "two hundred two billion, one hundred thirty-one million, two hundred ten thousand, forty-two".