31322201211121 has 4 divisors (see below), whose sum is σ = 31326337254772. Its totient is φ = 31318065167472.

The previous prime is 31322201211089. The next prime is 31322201211173. The reversal of 31322201211121 is 12111210222313.

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 30088022415025 + 1234178796096 = 5485255^2 + 1110936^2 .

It is a cyclic number.

It is not a de Polignac number, because 31322201211121 - 2⁵ = 31322201211089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31322201211092 and 31322201211101.

It is not an unprimeable number, because it can be changed into a prime (31322208211121) 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, 2068010466 + ... + 2068025611.

It is an arithmetic number, because the mean of its divisors is an integer number (7831584313693).

Almost surely, 2^{31322201211121} is an apocalyptic number.

It is an amenable number.

31322201211121 is a deficient number, since it is larger than the sum of its proper divisors (4136043651).

31322201211121 is an equidigital number, since it uses as much as digits as its factorization.

31322201211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4136043650.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 31322201211121 its reverse (12111210222313), we get a palindrome (43433411433434).

The spelling of 31322201211121 in words is "thirty-one trillion, three hundred twenty-two billion, two hundred one million, two hundred eleven thousand, one hundred twenty-one".