31221301122 has 60 divisors (see below), whose sum is σ = 76896956598. Its totient is φ = 9460994400.

The previous prime is 31221301061. The next prime is 31221301169. The reversal of 31221301122 is 22110312213.

It can be written as a sum of positive squares in only one way, i.e., 28025773281 + 3195527841 = 167409^2 + 56529^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31221301095 and 31221301104.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 776779 + ... + 815982.

Almost surely, 2^31221301122 is an apocalyptic number.

31221301122 is an abundant number, since it is smaller than the sum of its proper divisors (45675655476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31221301122 is a wasteful number, since it uses less digits than its factorization.

31221301122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1592797 (or 1592777 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 31221301122 its reverse (22110312213), we get a palindrome (53331613335).

The spelling of 31221301122 in words is "thirty-one billion, two hundred twenty-one million, three hundred one thousand, one hundred twenty-two".