312201301220 has 24 divisors (see below), whose sum is σ = 658729958208. Its totient is φ = 124288668000.

The previous prime is 312201301207. The next prime is 312201301229. The reversal of 312201301220 is 22103102213.

It is a super-2 number, since 2×312201301220² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (312201301229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36986456 + ... + 36994895.

It is an arithmetic number, because the mean of its divisors is an integer number (27447081592).

Almost surely, 2^312201301220 is an apocalyptic number.

It is an amenable number.

312201301220 is an abundant number, since it is smaller than the sum of its proper divisors (346528656988).

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

312201301220 is a wasteful number, since it uses less digits than its factorization.

312201301220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73981571 (or 73981569 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 312201301220 its reverse (22103102213), we get a palindrome (334304403433).

The spelling of 312201301220 in words is "three hundred twelve billion, two hundred one million, three hundred one thousand, two hundred twenty".