31122011002 has 4 divisors (see below), whose sum is σ = 46683016506. Its totient is φ = 15561005500.

The previous prime is 31122010991. The next prime is 31122011003. The reversal of 31122011002 is 20011022113.

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., 28136372121 + 2985638881 = 167739^2 + 54641^2 .

It is not an unprimeable number, because it can be changed into a prime (31122011003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7780502749 + ... + 7780502752.

Almost surely, 2^31122011002 is an apocalyptic number.

31122011002 is a deficient number, since it is larger than the sum of its proper divisors (15561005504).

31122011002 is a wasteful number, since it uses less digits than its factorization.

31122011002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15561005503.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 31122011002 its reverse (20011022113), we get a palindrome (51133033115).

The spelling of 31122011002 in words is "thirty-one billion, one hundred twenty-two million, eleven thousand, two".