312211310403 has 4 divisors (see below), whose sum is σ = 416281747208. Its totient is φ = 208140873600.

The previous prime is 312211310371. The next prime is 312211310429. The reversal of 312211310403 is 304013112213.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 312211310403 - 2⁵ = 312211310371 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 312211310403.

It is not an unprimeable number, because it can be changed into a prime (312211310473) 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, 52035218398 + ... + 52035218403.

It is an arithmetic number, because the mean of its divisors is an integer number (104070436802).

Almost surely, 2^312211310403 is an apocalyptic number.

312211310403 is a deficient number, since it is larger than the sum of its proper divisors (104070436805).

312211310403 is a wasteful number, since it uses less digits than its factorization.

312211310403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104070436804.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 312211310403 its reverse (304013112213), we get a palindrome (616224422616).

The spelling of 312211310403 in words is "three hundred twelve billion, two hundred eleven million, three hundred ten thousand, four hundred three".