31120131221122 has 4 divisors (see below), whose sum is σ = 46680196831686. Its totient is φ = 15560065610560.

The previous prime is 31120131221107. The next prime is 31120131221131. The reversal of 31120131221122 is 22112213102113.

It is a happy number.

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., 23691884539761 + 7428246681361 = 4867431^2 + 2725481^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31120131221093 and 31120131221102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7780032805279 + ... + 7780032805282.

Almost surely, 2^{31120131221122} is an apocalyptic number.

31120131221122 is a deficient number, since it is larger than the sum of its proper divisors (15560065610564).

31120131221122 is a wasteful number, since it uses less digits than its factorization.

31120131221122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15560065610563.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 31120131221122 its reverse (22112213102113), we get a palindrome (53232344323235).

The spelling of 31120131221122 in words is "thirty-one trillion, one hundred twenty billion, one hundred thirty-one million, two hundred twenty-one thousand, one hundred twenty-two".