31204200122 has 4 divisors (see below), whose sum is σ = 46806300186. Its totient is φ = 15602100060.

The previous prime is 31204200113. The next prime is 31204200149. The reversal of 31204200122 is 22100240213.

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., 22638512521 + 8565687601 = 150461^2 + 92551^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31204200122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7801050029 + ... + 7801050032.

Almost surely, 2^31204200122 is an apocalyptic number.

31204200122 is a deficient number, since it is larger than the sum of its proper divisors (15602100064).

31204200122 is a wasteful number, since it uses less digits than its factorization.

31204200122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15602100063.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 31204200122 its reverse (22100240213), we get a palindrome (53304440335).

The spelling of 31204200122 in words is "thirty-one billion, two hundred four million, two hundred thousand, one hundred twenty-two".