31503121616412 has 144 divisors (see below), whose sum is σ = 84521672202240. Its totient is φ = 9873472752000.

The previous prime is 31503121616381. The next prime is 31503121616419. The reversal of 31503121616412 is 21461612130513.

31503121616412 is a `hidden beast` number, since 3 + 1 + 5 + 0 + 3 + 1 + 2 + 1 + 6 + 1 + 641 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31503121616419) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10269237 + ... + 12979347.

It is an arithmetic number, because the mean of its divisors is an integer number (586956056960).

Almost surely, 2^{31503121616412} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31503121616412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42260836101120).

31503121616412 is an abundant number, since it is smaller than the sum of its proper divisors (53018550585828).

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

31503121616412 is a wasteful number, since it uses less digits than its factorization.

31503121616412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2710384 (or 2710379 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

Adding to 31503121616412 its reverse (21461612130513), we get a palindrome (52964733746925).

The spelling of 31503121616412 in words is "thirty-one trillion, five hundred three billion, one hundred twenty-one million, six hundred sixteen thousand, four hundred twelve".