31220000210120 has 32 divisors (see below), whose sum is σ = 70420175073720. Its totient is φ = 12456857932800.

The previous prime is 31220000210117. The next prime is 31220000210123. The reversal of 31220000210120 is 2101200002213.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (31220000210117) and next prime (31220000210123).

It can be written as a sum of positive squares in 4 ways, for example, as 29014662348676 + 2205337861444 = 5386526^2 + 1485038^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31220000210095 and 31220000210104.

It is not an unprimeable number, because it can be changed into a prime (31220000210123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 973175987 + ... + 973208066.

Almost surely, 2^{31220000210120} is an apocalyptic number.

It is an amenable number.

31220000210120 is an abundant number, since it is smaller than the sum of its proper divisors (39200174863600).

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

31220000210120 is a wasteful number, since it uses less digits than its factorization.

31220000210120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1946384465 (or 1946384461 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 31220000210120 its reverse (2101200002213), we get a palindrome (33321200212333).

The spelling of 31220000210120 in words is "thirty-one trillion, two hundred twenty billion, two hundred ten thousand, one hundred twenty".