221115410575379 has 2 divisors, whose sum is σ = 221115410575380. Its totient is φ = 221115410575378.

The previous prime is 221115410575369. The next prime is 221115410575387. The reversal of 221115410575379 is 973575014511122.

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-221115410575379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221115410575379.

It is not a weakly prime, because it can be changed into another prime (221115410575309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110557705287689 + 110557705287690.

It is an arithmetic number, because the mean of its divisors is an integer number (110557705287690).

Almost surely, 2^{221115410575379} is an apocalyptic number.

221115410575379 is a deficient number, since it is larger than the sum of its proper divisors (1).

221115410575379 is an equidigital number, since it uses as much as digits as its factorization.

221115410575379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2646000, while the sum is 53.

The spelling of 221115410575379 in words is "two hundred twenty-one trillion, one hundred fifteen billion, four hundred ten million, five hundred seventy-five thousand, three hundred seventy-nine".