312030021021 has 8 divisors (see below), whose sum is σ = 416053538880. Its totient is φ = 208013258592.

The previous prime is 312030020993. The next prime is 312030021041. The reversal of 312030021021 is 120120030213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 312030021021 - 2⁹ = 312030020509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312030021041) 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 7 ways as a sum of consecutive naturals, for example, 1580080 + ... + 1766553.

It is an arithmetic number, because the mean of its divisors is an integer number (52006692360).

Almost surely, 2^312030021021 is an apocalyptic number.

It is an amenable number.

312030021021 is a deficient number, since it is larger than the sum of its proper divisors (104023517859).

312030021021 is a wasteful number, since it uses less digits than its factorization.

312030021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3377715.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 312030021021 its reverse (120120030213), we get a palindrome (432150051234).

The spelling of 312030021021 in words is "three hundred twelve billion, thirty million, twenty-one thousand, twenty-one".