221115410515379 has 2 divisors, whose sum is σ = 221115410515380. Its totient is φ = 221115410515378.

The previous prime is 221115410515343. The next prime is 221115410515381. The reversal of 221115410515379 is 973515014511122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221115410515379 - 2⁸ = 221115410515123 is a prime.

Together with 221115410515381, 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 (221115410575379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110557705257689 + 110557705257690.

It is an arithmetic number, because the mean of its divisors is an integer number (110557705257690).

Almost surely, 2^{221115410515379} is an apocalyptic number.

221115410515379 is a deficient number, since it is larger than the sum of its proper divisors (1).

221115410515379 is an equidigital number, since it uses as much as digits as its factorization.

221115410515379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378000, while the sum is 47.

The spelling of 221115410515379 in words is "two hundred twenty-one trillion, one hundred fifteen billion, four hundred ten million, five hundred fifteen thousand, three hundred seventy-nine".