312221121101 has 4 divisors (see below), whose sum is σ = 312224741532. Its totient is φ = 312217500672.

The previous prime is 312221121089. The next prime is 312221121127. The reversal of 312221121101 is 101121122213.

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 154743103876 + 157478017225 = 393374^2 + 396835^2 .

It is a cyclic number.

It is not a de Polignac number, because 312221121101 - 2¹⁰ = 312221120077 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 312221121101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312221121181) 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, 1677620 + ... + 1854413.

It is an arithmetic number, because the mean of its divisors is an integer number (78056185383).

Almost surely, 2^312221121101 is an apocalyptic number.

It is an amenable number.

312221121101 is a deficient number, since it is larger than the sum of its proper divisors (3620431).

312221121101 is an equidigital number, since it uses as much as digits as its factorization.

312221121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3620430.

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

Adding to 312221121101 its reverse (101121122213), we get a palindrome (413342243314).

The spelling of 312221121101 in words is "three hundred twelve billion, two hundred twenty-one million, one hundred twenty-one thousand, one hundred one".