312102221020 has 12 divisors (see below), whose sum is σ = 655414664184. Its totient is φ = 124840888400.

The previous prime is 312102221017. The next prime is 312102221051. The reversal of 312102221020 is 20122201213.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 312102220985 and 312102221003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7802555506 + ... + 7802555545.

It is an arithmetic number, because the mean of its divisors is an integer number (54617888682).

Almost surely, 2^312102221020 is an apocalyptic number.

It is an amenable number.

312102221020 is an abundant number, since it is smaller than the sum of its proper divisors (343312443164).

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

312102221020 is a wasteful number, since it uses less digits than its factorization.

312102221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15605111060 (or 15605111058 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 312102221020 its reverse (20122201213), we get a palindrome (332224422233).

The spelling of 312102221020 in words is "three hundred twelve billion, one hundred two million, two hundred twenty-one thousand, twenty".