31203121120002 has 24 divisors (see below), whose sum is σ = 72807282613884. Its totient is φ = 9600960344544.

The previous prime is 31203121120001. The next prime is 31203121120019. The reversal of 31203121120002 is 20002112130213.

It can be written as a sum of positive squares in 2 ways, for example, as 29578054522041 + 1625066597961 = 5438571^2 + 1274781^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (31203121120001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66673335493 + ... + 66673335960.

Almost surely, 2^{31203121120002} is an apocalyptic number.

31203121120002 is an abundant number, since it is smaller than the sum of its proper divisors (41604161493882).

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

31203121120002 is a wasteful number, since it uses less digits than its factorization.

31203121120002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133346671474 (or 133346671471 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 31203121120002 its reverse (20002112130213), we get a palindrome (51205233250215).

The spelling of 31203121120002 in words is "thirty-one trillion, two hundred three billion, one hundred twenty-one million, one hundred twenty thousand, two".