312211123 has 8 divisors (see below), whose sum is σ = 357226592. Its totient is φ = 267299136.

The previous prime is 312211079. The next prime is 312211139. The reversal of 312211123 is 321112213.

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 312211123 - 2⁹ = 312210611 is a prime.

It is a super-2 number, since 2×312211123² = 194951570649842258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312211097 and 312211106.

It is not an unprimeable number, because it can be changed into a prime (312211153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19290 + ... + 31567.

It is an arithmetic number, because the mean of its divisors is an integer number (44653324).

Almost surely, 2^312211123 is an apocalyptic number.

312211123 is a deficient number, since it is larger than the sum of its proper divisors (45015469).

312211123 is an equidigital number, since it uses as much as digits as its factorization.

312211123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51741.

The product of its digits is 72, while the sum is 16.

The square root of 312211123 is about 17669.4969651091. The cubic root of 312211123 is about 678.3952375991.

Adding to 312211123 its reverse (321112213), we get a palindrome (633323336).

The spelling of 312211123 in words is "three hundred twelve million, two hundred eleven thousand, one hundred twenty-three".