102220999 has 4 divisors (see below), whose sum is σ = 102609936. Its totient is φ = 101832064.

The previous prime is 102220997. The next prime is 102221071. The reversal of 102220999 is 999022201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102220999 - 2¹ = 102220997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102220997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194074 + ... + 194599.

It is an arithmetic number, because the mean of its divisors is an integer number (25652484).

Almost surely, 2^102220999 is an apocalyptic number.

102220999 is a deficient number, since it is larger than the sum of its proper divisors (388937).

102220999 is an equidigital number, since it uses as much as digits as its factorization.

102220999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388936.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 102220999 is about 10110.4400992242. The cubic root of 102220999 is about 467.5700738565.

The spelling of 102220999 in words is "one hundred two million, two hundred twenty thousand, nine hundred ninety-nine".