210122312031172 has 6 divisors (see below), whose sum is σ = 367714046054558. Its totient is φ = 105061156015584.

The previous prime is 210122312031077. The next prime is 210122312031173. The reversal of 210122312031172 is 271130213221012.

It can be written as a sum of positive squares in only one way, i.e., 138863457313156 + 71258854718016 = 11784034^2 + 8441496^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 210122312031172.

It is not an unprimeable number, because it can be changed into a prime (210122312031173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26265289003893 + ... + 26265289003900.

Almost surely, 2^{210122312031172} is an apocalyptic number.

It is an amenable number.

210122312031172 is a deficient number, since it is larger than the sum of its proper divisors (157591734023386).

210122312031172 is a wasteful number, since it uses less digits than its factorization.

210122312031172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52530578007797 (or 52530578007795 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

Adding to 210122312031172 its reverse (271130213221012), we get a palindrome (481252525252184).

The spelling of 210122312031172 in words is "two hundred ten trillion, one hundred twenty-two billion, three hundred twelve million, thirty-one thousand, one hundred seventy-two".