321212222220 has 48 divisors (see below), whose sum is σ = 899548661088. Its totient is φ = 85641884160.

The previous prime is 321212222213. The next prime is 321212222269. The reversal of 321212222220 is 22222212123.

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 15 ways as a sum of consecutive naturals, for example, 105049 + ... + 808368.

It is an arithmetic number, because the mean of its divisors is an integer number (18740597106).

Almost surely, 2^321212222220 is an apocalyptic number.

321212222220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

321212222220 is an abundant number, since it is smaller than the sum of its proper divisors (578336438868).

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

321212222220 is a wasteful number, since it uses less digits than its factorization.

321212222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919290 (or 919288 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 321212222220 its reverse (22222212123), we get a palindrome (343434434343).

The spelling of 321212222220 in words is "three hundred twenty-one billion, two hundred twelve million, two hundred twenty-two thousand, two hundred twenty".