312102200221 has 4 divisors (see below), whose sum is σ = 356688228832. Its totient is φ = 267516171612.

The previous prime is 312102200197. The next prime is 312102200243. The reversal of 312102200221 is 122002201213.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 312102200221 - 2⁹ = 312102199709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312102200195 and 312102200204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312102200281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22293014295 + ... + 22293014308.

It is an arithmetic number, because the mean of its divisors is an integer number (89172057208).

Almost surely, 2^312102200221 is an apocalyptic number.

It is an amenable number.

312102200221 is a deficient number, since it is larger than the sum of its proper divisors (44586028611).

312102200221 is an equidigital number, since it uses as much as digits as its factorization.

312102200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44586028610.

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

Adding to 312102200221 its reverse (122002201213), we get a palindrome (434104401434).

The spelling of 312102200221 in words is "three hundred twelve billion, one hundred two million, two hundred thousand, two hundred twenty-one".