221303111111431 has 2 divisors, whose sum is σ = 221303111111432. Its totient is φ = 221303111111430.

The previous prime is 221303111111429. The next prime is 221303111111441. The reversal of 221303111111431 is 134111111303122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221303111111431 - 2¹ = 221303111111429 is a prime.

It is a super-2 number, since 2×221303111111431² (a number of 29 digits) contains 22 as substring.

Together with 221303111111429, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 221303111111396 and 221303111111405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221303111111441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110651555555715 + 110651555555716.

It is an arithmetic number, because the mean of its divisors is an integer number (110651555555716).

Almost surely, 2^{221303111111431} is an apocalyptic number.

221303111111431 is a deficient number, since it is larger than the sum of its proper divisors (1).

221303111111431 is an equidigital number, since it uses as much as digits as its factorization.

221303111111431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 25.

Adding to 221303111111431 its reverse (134111111303122), we get a palindrome (355414222414553).

The spelling of 221303111111431 in words is "two hundred twenty-one trillion, three hundred three billion, one hundred eleven million, one hundred eleven thousand, four hundred thirty-one".