102221424 has 30 divisors (see below), whose sum is σ = 286078416. Its totient is φ = 34073760.

The previous prime is 102221401. The next prime is 102221429. The reversal of 102221424 is 424122201.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 102221397 and 102221406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102221429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 354792 + ... + 355079.

Almost surely, 2^102221424 is an apocalyptic number.

It is an amenable number.

102221424 is an abundant number, since it is smaller than the sum of its proper divisors (183856992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102221424 is a wasteful number, since it uses less digits than its factorization.

102221424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709885 (or 709876 counting only the distinct ones).

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

The square root of 102221424 is about 10110.4611170807. The cubic root of 102221424 is about 467.5707218545.

Adding to 102221424 its reverse (424122201), we get a palindrome (526343625).

The spelling of 102221424 in words is "one hundred two million, two hundred twenty-one thousand, four hundred twenty-four".