231111113122202 has 4 divisors (see below), whose sum is σ = 346666669683306. Its totient is φ = 115555556561100.

The previous prime is 231111113122171. The next prime is 231111113122243. The reversal of 231111113122202 is 202221311111132.

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., 163795996554961 + 67315116567241 = 12798281^2 + 8204579^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57777778280549 + ... + 57777778280552.

Almost surely, 2^{231111113122202} is an apocalyptic number.

231111113122202 is a deficient number, since it is larger than the sum of its proper divisors (115555556561104).

231111113122202 is a wasteful number, since it uses less digits than its factorization.

231111113122202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115555556561103.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 231111113122202 its reverse (202221311111132), we get a palindrome (433332424233334).

The spelling of 231111113122202 in words is "two hundred thirty-one trillion, one hundred eleven billion, one hundred thirteen million, one hundred twenty-two thousand, two hundred two".