312201021220 has 48 divisors (see below), whose sum is σ = 722305636416. Its totient is φ = 112403600000.

The previous prime is 312201021211. The next prime is 312201021229. The reversal of 312201021220 is 22120102213.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (312201021211) and next prime (312201021229).

It is a junction number, because it is equal to n+sod(n) for n = 312201021194 and 312201021203.

It is not an unprimeable number, because it can be changed into a prime (312201021229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7003006 + ... + 7047445.

It is an arithmetic number, because the mean of its divisors is an integer number (15048034092).

Almost surely, 2^312201021220 is an apocalyptic number.

It is an amenable number.

312201021220 is an abundant number, since it is smaller than the sum of its proper divisors (410104615196).

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

312201021220 is a wasteful number, since it uses less digits than its factorization.

312201021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14050572 (or 14050570 counting only the distinct ones).

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

Adding to 312201021220 its reverse (22120102213), we get a palindrome (334321123433).

The spelling of 312201021220 in words is "three hundred twelve billion, two hundred one million, twenty-one thousand, two hundred twenty".