312210101221 has 8 divisors (see below), whose sum is σ = 329010044544. Its totient is φ = 295678957200.

The previous prime is 312210101209. The next prime is 312210101227. The reversal of 312210101221 is 122101012213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 312210101221 - 2¹³ = 312210093029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312210101195 and 312210101204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312210101227) 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, 67197441 + ... + 67202086.

It is an arithmetic number, because the mean of its divisors is an integer number (41126255568).

Almost surely, 2^312210101221 is an apocalyptic number.

It is an amenable number.

312210101221 is a deficient number, since it is larger than the sum of its proper divisors (16799943323).

312210101221 is a wasteful number, since it uses less digits than its factorization.

312210101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134399651.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 312210101221 its reverse (122101012213), we get a palindrome (434311113434).

It can be divided in two parts, 3 and 12210101221, that multiplied together give a palindrome (36630303663).

The spelling of 312210101221 in words is "three hundred twelve billion, two hundred ten million, one hundred one thousand, two hundred twenty-one".