31144004120000 has 70 divisors (see below), whose sum is σ = 77227008515448. Its totient is φ = 12457601632000.

The previous prime is 31144004119993. The next prime is 31144004120003. The reversal of 31144004120000 is 2140044113.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31144004120003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 389260052 + ... + 389340051.

Almost surely, 2^{31144004120000} is an apocalyptic number.

It is an amenable number.

31144004120000 is an abundant number, since it is smaller than the sum of its proper divisors (46083004395448).

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

31144004120000 is an frugal number, since it uses more digits than its factorization.

31144004120000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778600135 (or 778600110 counting only the distinct ones).

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

Adding to 31144004120000 its reverse (2140044113), we get a palindrome (31146144164113).

The spelling of 31144004120000 in words is "thirty-one trillion, one hundred forty-four billion, four million, one hundred twenty thousand".