312121203210030 has 64 divisors (see below), whose sum is σ = 769220252877888. Its totient is φ = 81023858012160.

The previous prime is 312121203210023. The next prime is 312121203210049. The reversal of 312121203210030 is 30012302121213.

It is a junction number, because it is equal to n+sod(n) for n = 312121203209979 and 312121203210006.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 878987617 + ... + 879342636.

It is an arithmetic number, because the mean of its divisors is an integer number (12019066451217).

Almost surely, 2^{312121203210030} is an apocalyptic number.

312121203210030 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

312121203210030 is an abundant number, since it is smaller than the sum of its proper divisors (457099049667858).

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

312121203210030 is a wasteful number, since it uses less digits than its factorization.

312121203210030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1758330421.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 312121203210030 its reverse (30012302121213), we get a palindrome (342133505331243).

The spelling of 312121203210030 in words is "three hundred twelve trillion, one hundred twenty-one billion, two hundred three million, two hundred ten thousand, thirty".