312021121206 has 16 divisors (see below), whose sum is σ = 656886571200. Its totient is φ = 98532985608.

The previous prime is 312021121189. The next prime is 312021121231. The reversal of 312021121206 is 602121120213.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1368513576 + ... + 1368513803.

It is an arithmetic number, because the mean of its divisors is an integer number (41055410700).

Almost surely, 2^312021121206 is an apocalyptic number.

312021121206 is an abundant number, since it is smaller than the sum of its proper divisors (344865449994).

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

312021121206 is a wasteful number, since it uses less digits than its factorization.

312021121206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2737027403.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 312021121206 its reverse (602121120213), we get a palindrome (914142241419).

The spelling of 312021121206 in words is "three hundred twelve billion, twenty-one million, one hundred twenty-one thousand, two hundred six".