221698445411 has 2 divisors, whose sum is σ = 221698445412. Its totient is φ = 221698445410.

The previous prime is 221698445401. The next prime is 221698445431. The reversal of 221698445411 is 114544896122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221698445411 - 2¹⁴ = 221698429027 is a prime.

It is not a weakly prime, because it can be changed into another prime (221698445401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110849222705 + 110849222706.

It is an arithmetic number, because the mean of its divisors is an integer number (110849222706).

Almost surely, 2^221698445411 is an apocalyptic number.

221698445411 is a deficient number, since it is larger than the sum of its proper divisors (1).

221698445411 is an equidigital number, since it uses as much as digits as its factorization.

221698445411 is an evil number, because the sum of its binary digits is even.

The product of its digits is 552960, while the sum is 47.

The spelling of 221698445411 in words is "two hundred twenty-one billion, six hundred ninety-eight million, four hundred forty-five thousand, four hundred eleven".