221401199 has 2 divisors, whose sum is σ = 221401200. Its totient is φ = 221401198.

The previous prime is 221401181. The next prime is 221401261. The reversal of 221401199 is 991104122.

221401199 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221401199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221400199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110700599 + 110700600.

It is an arithmetic number, because the mean of its divisors is an integer number (110700600).

Almost surely, 2^221401199 is an apocalyptic number.

221401199 is a deficient number, since it is larger than the sum of its proper divisors (1).

221401199 is an equidigital number, since it uses as much as digits as its factorization.

221401199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 221401199 is about 14879.5564113988. The cubic root of 221401199 is about 604.9599946227.

The spelling of 221401199 in words is "two hundred twenty-one million, four hundred one thousand, one hundred ninety-nine".