102153221 has 16 divisors (see below), whose sum is σ = 110574720. Its totient is φ = 94026240.

The previous prime is 102153217. The next prime is 102153257. The reversal of 102153221 is 122351201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 102153221 - 2² = 102153217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102153221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102153211) 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, 161576 + ... + 162206.

It is an arithmetic number, because the mean of its divisors is an integer number (6910920).

Almost surely, 2^102153221 is an apocalyptic number.

It is an amenable number.

102153221 is a deficient number, since it is larger than the sum of its proper divisors (8421499).

102153221 is a wasteful number, since it uses less digits than its factorization.

102153221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 102153221 is about 10107.0876616363. The cubic root of 102153221 is about 467.4667096697.

The spelling of 102153221 in words is "one hundred two million, one hundred fifty-three thousand, two hundred twenty-one".