311441200221 has 4 divisors (see below), whose sum is σ = 415254933632. Its totient is φ = 207627466812.

The previous prime is 311441200207. The next prime is 311441200229. The reversal of 311441200221 is 122002144113.

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 not a de Polignac number, because 311441200221 - 2⁶ = 311441200157 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 (311441200229) 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, 51906866701 + ... + 51906866706.

It is an arithmetic number, because the mean of its divisors is an integer number (103813733408).

Almost surely, 2^311441200221 is an apocalyptic number.

It is an amenable number.

311441200221 is a deficient number, since it is larger than the sum of its proper divisors (103813733411).

311441200221 is a wasteful number, since it uses less digits than its factorization.

311441200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103813733410.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 311441200221 its reverse (122002144113), we get a palindrome (433443344334).

The spelling of 311441200221 in words is "three hundred eleven billion, four hundred forty-one million, two hundred thousand, two hundred twenty-one".