102150921 has 8 divisors (see below), whose sum is σ = 140594944. Its totient is φ = 65903760.

The previous prime is 102150913. The next prime is 102150941. The reversal of 102150921 is 129051201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102150921 - 2³ = 102150913 is a prime.

It is a super-2 number, since 2×102150921² = 20869621322296482, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (102150911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 549106 + ... + 549291.

It is an arithmetic number, because the mean of its divisors is an integer number (17574368).

Almost surely, 2^102150921 is an apocalyptic number.

It is an amenable number.

102150921 is a deficient number, since it is larger than the sum of its proper divisors (38444023).

102150921 is a wasteful number, since it uses less digits than its factorization.

102150921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098431.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 102150921 is about 10106.9738794557. The cubic root of 102150921 is about 467.4632012748.

The spelling of 102150921 in words is "one hundred two million, one hundred fifty thousand, nine hundred twenty-one".