31000312002122 has 4 divisors (see below), whose sum is σ = 46500468003186. Its totient is φ = 15500156001060.

The previous prime is 31000312002113. The next prime is 31000312002167. The reversal of 31000312002122 is 22120021300013.

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., 30620164535401 + 380147466721 = 5533549^2 + 616561^2 .

It is a super-2 number, since 2×31000312002122² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31000312002122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7750078000529 + ... + 7750078000532.

Almost surely, 2^{31000312002122} is an apocalyptic number.

31000312002122 is a deficient number, since it is larger than the sum of its proper divisors (15500156001064).

31000312002122 is a wasteful number, since it uses less digits than its factorization.

31000312002122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15500156001063.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31000312002122 its reverse (22120021300013), we get a palindrome (53120333302135).

The spelling of 31000312002122 in words is "thirty-one trillion, three hundred twelve million, two thousand, one hundred twenty-two".