11221320312131 has 2 divisors, whose sum is σ = 11221320312132. Its totient is φ = 11221320312130.

The previous prime is 11221320312109. The next prime is 11221320312133. The reversal of 11221320312131 is 13121302312211.

It is a happy number.

11221320312131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11221320312131 - 2²² = 11221316117827 is a prime.

It is a super-2 number, since 2×11221320312131² (a number of 27 digits) contains 22 as substring.

Together with 11221320312133, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 11221320312097 and 11221320312106.

It is not a weakly prime, because it can be changed into another prime (11221320312133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610660156065 + 5610660156066.

It is an arithmetic number, because the mean of its divisors is an integer number (5610660156066).

Almost surely, 2^{11221320312131} is an apocalyptic number.

11221320312131 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221320312131 is an equidigital number, since it uses as much as digits as its factorization.

11221320312131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 11221320312131 its reverse (13121302312211), we get a palindrome (24342622624342).

The spelling of 11221320312131 in words is "eleven trillion, two hundred twenty-one billion, three hundred twenty million, three hundred twelve thousand, one hundred thirty-one".