312002100221 has 4 divisors (see below), whose sum is σ = 356573828832. Its totient is φ = 267430371612.

The previous prime is 312002100191. The next prime is 312002100283. The reversal of 312002100221 is 122001200213.

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, and also an emirpimes, since its reverse is a distinct semiprime: 122001200213 = 17 ⋅7176541189.

It is a cyclic number.

It is not a de Polignac number, because 312002100221 - 2²² = 311997905917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312002100196 and 312002100205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312002000221) 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, 22285864295 + ... + 22285864308.

It is an arithmetic number, because the mean of its divisors is an integer number (89143457208).

Almost surely, 2^312002100221 is an apocalyptic number.

It is an amenable number.

312002100221 is a deficient number, since it is larger than the sum of its proper divisors (44571728611).

312002100221 is an equidigital number, since it uses as much as digits as its factorization.

312002100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44571728610.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 312002100221 its reverse (122001200213), we get a palindrome (434003300434).

The spelling of 312002100221 in words is "three hundred twelve billion, two million, one hundred thousand, two hundred twenty-one".