312211101121 has 4 divisors (see below), whose sum is σ = 315302300244. Its totient is φ = 309119902000.

The previous prime is 312211101109. The next prime is 312211101151. The reversal of 312211101121 is 121101112213.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 264540492225 + 47670608896 = 514335^2 + 218336^2 .

It is a cyclic number.

It is not a de Polignac number, because 312211101121 - 2¹⁵ = 312211068353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312211101095 and 312211101104.

It is not an unprimeable number, because it can be changed into a prime (312211101151) 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, 1545599410 + ... + 1545599611.

It is an arithmetic number, because the mean of its divisors is an integer number (78825575061).

Almost surely, 2^312211101121 is an apocalyptic number.

It is an amenable number.

312211101121 is a deficient number, since it is larger than the sum of its proper divisors (3091199123).

312211101121 is a wasteful number, since it uses less digits than its factorization.

312211101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3091199122.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 312211101121 its reverse (121101112213), we get a palindrome (433312213334).

The spelling of 312211101121 in words is "three hundred twelve billion, two hundred eleven million, one hundred one thousand, one hundred twenty-one".