221076131 has 2 divisors, whose sum is σ = 221076132. Its totient is φ = 221076130.

The previous prime is 221076113. The next prime is 221076133. The reversal of 221076131 is 131670122.

Together with previous prime (221076113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221076131 is a prime.

It is a super-2 number, since 2×221076131² = 97749311395858322, which contains 22 as substring.

Together with 221076133, 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 = 221076097 and 221076106.

It is not a weakly prime, because it can be changed into another prime (221076133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110538065 + 110538066.

It is an arithmetic number, because the mean of its divisors is an integer number (110538066).

Almost surely, 2^221076131 is an apocalyptic number.

221076131 is a deficient number, since it is larger than the sum of its proper divisors (1).

221076131 is an equidigital number, since it uses as much as digits as its factorization.

221076131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 221076131 is about 14868.6290894621. The cubic root of 221076131 is about 604.6637760249.

The spelling of 221076131 in words is "two hundred twenty-one million, seventy-six thousand, one hundred thirty-one".