102424221 has 12 divisors (see below), whose sum is σ = 154378848. Its totient is φ = 65313864.

The previous prime is 102424213. The next prime is 102424229. The reversal of 102424221 is 122424201.

102424221 is a `hidden beast` number, since 1 + 0 + 242 + 422 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (102424213) and next prime (102424229).

It is not a de Polignac number, because 102424221 - 2³ = 102424213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102424194 and 102424203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102424229) 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, 247195 + ... + 247608.

It is an arithmetic number, because the mean of its divisors is an integer number (12864904).

Almost surely, 2^102424221 is an apocalyptic number.

It is an amenable number.

102424221 is a deficient number, since it is larger than the sum of its proper divisors (51954627).

102424221 is a wasteful number, since it uses less digits than its factorization.

102424221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494832 (or 494829 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 102424221 is about 10120.4852156406. The cubic root of 102424221 is about 467.8797219945.

Adding to 102424221 its reverse (122424201), we get a palindrome (224848422).

The spelling of 102424221 in words is "one hundred two million, four hundred twenty-four thousand, two hundred twenty-one".