312121030 has 24 divisors (see below), whose sum is σ = 608362272. Its totient is φ = 115244064.

The previous prime is 312121013. The next prime is 312121049. The reversal of 312121030 is 30121213.

312121030 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 312121030.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90654 + ... + 94033.

It is an arithmetic number, because the mean of its divisors is an integer number (25348428).

Almost surely, 2^312121030 is an apocalyptic number.

312121030 is a deficient number, since it is larger than the sum of its proper divisors (296241242).

312121030 is a wasteful number, since it uses less digits than its factorization.

312121030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184720 (or 184707 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 312121030 is about 17666.9473877068. The cubic root of 312121030 is about 678.3299777610.

Adding to 312121030 its reverse (30121213), we get a palindrome (342242243).

The spelling of 312121030 in words is "three hundred twelve million, one hundred twenty-one thousand, thirty".