102162221 has 16 divisors (see below), whose sum is σ = 123740160. Its totient is φ = 82393200.

The previous prime is 102162211. The next prime is 102162233. The reversal of 102162221 is 122261201.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102162221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102162221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102162211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17540 + ... + 22626.

It is an arithmetic number, because the mean of its divisors is an integer number (7733760).

Almost surely, 2^102162221 is an apocalyptic number.

It is an amenable number.

102162221 is a deficient number, since it is larger than the sum of its proper divisors (21577939).

102162221 is a wasteful number, since it uses less digits than its factorization.

102162221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5264.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 102162221 is about 10107.5328839435. The cubic root of 102162221 is about 467.4804376650.

The spelling of 102162221 in words is "one hundred two million, one hundred sixty-two thousand, two hundred twenty-one".