202102310030122 has 4 divisors (see below), whose sum is σ = 303153465045186. Its totient is φ = 101051155015060.

The previous prime is 202102310030087. The next prime is 202102310030123. The reversal of 202102310030122 is 221030013201202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 154276496214481 + 47825813815641 = 12420809^2 + 6915621^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 202102310030122.

It is not an unprimeable number, because it can be changed into a prime (202102310030123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50525577507529 + ... + 50525577507532.

Almost surely, 2^{202102310030122} is an apocalyptic number.

202102310030122 is a deficient number, since it is larger than the sum of its proper divisors (101051155015064).

202102310030122 is a wasteful number, since it uses less digits than its factorization.

202102310030122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101051155015063.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 202102310030122 its reverse (221030013201202), we get a palindrome (423132323231324).

The spelling of 202102310030122 in words is "two hundred two trillion, one hundred two billion, three hundred ten million, thirty thousand, one hundred twenty-two".