12221706308953 has 4 divisors (see below), whose sum is σ = 12221780282020. Its totient is φ = 12221632335888.

The previous prime is 12221706308893. The next prime is 12221706308957. The reversal of 12221706308953 is 35980360712221.

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 7787599053129 + 4434107255824 = 2790627^2 + 2105732^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12221706308953 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12221706308897 and 12221706308906.

It is not an unprimeable number, because it can be changed into a prime (12221706308957) 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, 36738150 + ... + 37069327.

It is an arithmetic number, because the mean of its divisors is an integer number (3055445070505).

Almost surely, 2^{12221706308953} is an apocalyptic number.

It is an amenable number.

12221706308953 is a deficient number, since it is larger than the sum of its proper divisors (73973067).

12221706308953 is an equidigital number, since it uses as much as digits as its factorization.

12221706308953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73973066.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 12221706308953 in words is "twelve trillion, two hundred twenty-one billion, seven hundred six million, three hundred eight thousand, nine hundred fifty-three".