31220411240000 has 140 divisors (see below), whose sum is σ = 79913782003968. Its totient is φ = 12085320000000.

The previous prime is 31220411239967. The next prime is 31220411240003. The reversal of 31220411240000 is 4211402213.

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

It is not an unprimeable number, because it can be changed into a prime (31220411240003) by changing a digit.

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 in 19 ways as a sum of consecutive naturals, for example, 11348876 + ... + 13828875.

Almost surely, 2^{31220411240000} is an apocalyptic number.

It is an amenable number.

31220411240000 is an abundant number, since it is smaller than the sum of its proper divisors (48693370763968).

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

31220411240000 is an equidigital number, since it uses as much as digits as its factorization.

31220411240000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25177814 (or 25177789 counting only the distinct ones).

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

Adding to 31220411240000 its reverse (4211402213), we get a palindrome (31224622642213).

The spelling of 31220411240000 in words is "thirty-one trillion, two hundred twenty billion, four hundred eleven million, two hundred forty thousand".