221401899 has 12 divisors (see below), whose sum is σ = 322908976. Its totient is φ = 146167632.

The previous prime is 221401853. The next prime is 221401903. The reversal of 221401899 is 998104122.

221401899 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221401899 - 2¹¹ = 221399851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221401849) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 118492 + ... + 120345.

Almost surely, 2^221401899 is an apocalyptic number.

221401899 is a deficient number, since it is larger than the sum of its proper divisors (101507077).

221401899 is a wasteful number, since it uses less digits than its factorization.

221401899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238946 (or 238943 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 221401899 is about 14879.5799335868. The cubic root of 221401899 is about 604.9606321855.

The spelling of 221401899 in words is "two hundred twenty-one million, four hundred one thousand, eight hundred ninety-nine".