312003121031 has 4 divisors (see below), whose sum is σ = 356574995472. Its totient is φ = 267431246592.

The previous prime is 312003121009. The next prime is 312003121063. The reversal of 312003121031 is 130121300213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 312003121031 - 2²² = 311998926727 is a prime.

It is a super-2 number, since 2×312003121031² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312003121931) 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, 22285937210 + ... + 22285937223.

It is an arithmetic number, because the mean of its divisors is an integer number (89143748868).

Almost surely, 2^312003121031 is an apocalyptic number.

312003121031 is a deficient number, since it is larger than the sum of its proper divisors (44571874441).

312003121031 is an equidigital number, since it uses as much as digits as its factorization.

312003121031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44571874440.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 312003121031 its reverse (130121300213), we get a palindrome (442124421244).

The spelling of 312003121031 in words is "three hundred twelve billion, three million, one hundred twenty-one thousand, thirty-one".