312212030220 has 72 divisors (see below), whose sum is σ = 956419878960. Its totient is φ = 82432214400.

The previous prime is 312212030201. The next prime is 312212030237. The reversal of 312212030220 is 22030212213.

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 = 312212030193 and 312212030202.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8568510 + ... + 8604869.

It is an arithmetic number, because the mean of its divisors is an integer number (13283609430).

Almost surely, 2^312212030220 is an apocalyptic number.

312212030220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

312212030220 is an abundant number, since it is smaller than the sum of its proper divisors (644207848740).

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

312212030220 is a wasteful number, since it uses less digits than its factorization.

312212030220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17173495 (or 17173490 counting only the distinct ones).

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

Adding to 312212030220 its reverse (22030212213), we get a palindrome (334242242433).

The spelling of 312212030220 in words is "three hundred twelve billion, two hundred twelve million, thirty thousand, two hundred twenty".