312221202030 has 96 divisors (see below), whose sum is σ = 820323492768. Its totient is φ = 82383264000.

The previous prime is 312221201983. The next prime is 312221202061. The reversal of 312221202030 is 30202122213.

It is a super-2 number, since 2×312221202030² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 312221201994 and 312221202012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15870400 + ... + 15890060.

It is an arithmetic number, because the mean of its divisors is an integer number (8545036383).

Almost surely, 2^312221202030 is an apocalyptic number.

312221202030 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 312221202030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (410161746384).

312221202030 is an abundant number, since it is smaller than the sum of its proper divisors (508102290738).

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

312221202030 is a wasteful number, since it uses less digits than its factorization.

312221202030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21522 (or 21519 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 312221202030 its reverse (30202122213), we get a palindrome (342423324243).

The spelling of 312221202030 in words is "three hundred twelve billion, two hundred twenty-one million, two hundred two thousand, thirty".