221213343312131 has 2 divisors, whose sum is σ = 221213343312132. Its totient is φ = 221213343312130.

The previous prime is 221213343312097. The next prime is 221213343312133. The reversal of 221213343312131 is 131213343312122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221213343312131 is a prime.

It is a super-2 number, since 2×221213343312131² (a number of 29 digits) contains 22 as substring.

Together with 221213343312133, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (221213343312133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110606671656065 + 110606671656066.

It is an arithmetic number, because the mean of its divisors is an integer number (110606671656066).

Almost surely, 2^{221213343312131} is an apocalyptic number.

221213343312131 is a deficient number, since it is larger than the sum of its proper divisors (1).

221213343312131 is an equidigital number, since it uses as much as digits as its factorization.

221213343312131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 32.

Adding to 221213343312131 its reverse (131213343312122), we get a palindrome (352426686624253).

Subtracting from 221213343312131 its reverse (131213343312122), we obtain a palindrome (90000000000009).

The spelling of 221213343312131 in words is "two hundred twenty-one trillion, two hundred thirteen billion, three hundred forty-three million, three hundred twelve thousand, one hundred thirty-one".