312221211330 has 32 divisors (see below), whose sum is σ = 856378180224. Its totient is φ = 71364848256.

The previous prime is 312221211317. The next prime is 312221211397. The reversal of 312221211330 is 33112122213.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 312221211297 and 312221211306.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 743383627 + ... + 743384046.

It is an arithmetic number, because the mean of its divisors is an integer number (26761818132).

Almost surely, 2^312221211330 is an apocalyptic number.

312221211330 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

312221211330 is an abundant number, since it is smaller than the sum of its proper divisors (544156968894).

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

312221211330 is a wasteful number, since it uses less digits than its factorization.

312221211330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486767690.

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

Adding to 312221211330 its reverse (33112122213), we get a palindrome (345333333543).

The spelling of 312221211330 in words is "three hundred twelve billion, two hundred twenty-one million, two hundred eleven thousand, three hundred thirty".