311661214421 has 8 divisors (see below), whose sum is σ = 330001265880. Its totient is φ = 293321945088.

The previous prime is 311661214367. The next prime is 311661214477. The reversal of 311661214421 is 124412166113.

It can be written as a sum of positive squares in 4 ways, for example, as 103256182225 + 208405032196 = 321335^2 + 456514^2 .

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

It is not a de Polignac number, because 311661214421 - 2³⁴ = 294481345237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311661214021) 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, 757685 + ... + 1094261.

It is an arithmetic number, because the mean of its divisors is an integer number (41250158235).

Almost surely, 2^311661214421 is an apocalyptic number.

It is an amenable number.

311661214421 is a deficient number, since it is larger than the sum of its proper divisors (18340051459).

311661214421 is a wasteful number, since it uses less digits than its factorization.

311661214421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391063.

The product of its digits is 6912, while the sum is 32.

The spelling of 311661214421 in words is "three hundred eleven billion, six hundred sixty-one million, two hundred fourteen thousand, four hundred twenty-one".