31031202122 has 4 divisors (see below), whose sum is σ = 46546803186. Its totient is φ = 15515601060.

The previous prime is 31031202101. The next prime is 31031202259. The reversal of 31031202122 is 22120213013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22120213013 = 89087 ⋅248299.

It can be written as a sum of positive squares in only one way, i.e., 30965088961 + 66113161 = 175969^2 + 8131^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31031202122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7757800529 + ... + 7757800532.

Almost surely, 2^31031202122 is an apocalyptic number.

31031202122 is a deficient number, since it is larger than the sum of its proper divisors (15515601064).

31031202122 is a wasteful number, since it uses less digits than its factorization.

31031202122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15515601063.

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

Adding to 31031202122 its reverse (22120213013), we get a palindrome (53151415135).

The spelling of 31031202122 in words is "thirty-one billion, thirty-one million, two hundred two thousand, one hundred twenty-two".