312101213 has 4 divisors (see below), whose sum is σ = 312245088. Its totient is φ = 311957340.

The previous prime is 312101189. The next prime is 312101221.

312101213 is nontrivially palindromic in base 10.

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 312101213 - 2¹⁸ = 311839069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312101233) 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, 68633 + ... + 73038.

It is an arithmetic number, because the mean of its divisors is an integer number (78061272).

Almost surely, 2^312101213 is an apocalyptic number.

It is an amenable number.

312101213 is a deficient number, since it is larger than the sum of its proper divisors (143875).

312101213 is a wasteful number, since it uses less digits than its factorization.

312101213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143874.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 312101213 is about 17666.3865292255. The cubic root of 312101213 is about 678.3156214181.

It can be divided in two parts, 31210 and 1213, that added together give a palindrome (32423).

The spelling of 312101213 in words is "three hundred twelve million, one hundred one thousand, two hundred thirteen".