311220211021001 has 4 divisors (see below), whose sum is σ = 311243073020292. Its totient is φ = 311197349021712.

The previous prime is 311220211020919. The next prime is 311220211021033. The reversal of 311220211021001 is 100120112022113.

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 41443659405625 + 269776551615376 = 6437675^2 + 16424876^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311220211021001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311220211021091) 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, 11430979226 + ... + 11431006451.

It is an arithmetic number, because the mean of its divisors is an integer number (77810768255073).

Almost surely, 2^{311220211021001} is an apocalyptic number.

It is an amenable number.

311220211021001 is a deficient number, since it is larger than the sum of its proper divisors (22861999291).

311220211021001 is a wasteful number, since it uses less digits than its factorization.

311220211021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22861999290.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 311220211021001 its reverse (100120112022113), we get a palindrome (411340323043114).

The spelling of 311220211021001 in words is "three hundred eleven trillion, two hundred twenty billion, two hundred eleven million, twenty-one thousand, one".