31210122040040 has 16 divisors (see below), whose sum is σ = 70222774590180. Its totient is φ = 12484048816000.

The previous prime is 31210122039991. The next prime is 31210122040049. The reversal of 31210122040040 is 4004022101213.

It can be written as a sum of positive squares in 2 ways, for example, as 31113392331844 + 96729708196 = 5577938^2 + 311014^2 .

It is a super-3 number, since 3×31210122040040³ (a number of 41 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 31210122039994 and 31210122040021.

It is not an unprimeable number, because it can be changed into a prime (31210122040049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 390126525461 + ... + 390126525540.

Almost surely, 2^{31210122040040} is an apocalyptic number.

It is an amenable number.

31210122040040 is an abundant number, since it is smaller than the sum of its proper divisors (39012652550140).

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

31210122040040 is a wasteful number, since it uses less digits than its factorization.

31210122040040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780253051012 (or 780253051008 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 31210122040040 its reverse (4004022101213), we get a palindrome (35214144141253).

The spelling of 31210122040040 in words is "thirty-one trillion, two hundred ten billion, one hundred twenty-two million, forty thousand, forty".