102221421 has 8 divisors (see below), whose sum is σ = 138529824. Its totient is φ = 67030320.

The previous prime is 102221401. The next prime is 102221429. The reversal of 102221421 is 124122201.

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

It is not a de Polignac number, because 102221421 - 2⁷ = 102221293 is a prime.

It is a super-2 number, since 2×102221421² = 20898437822518482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 102221421.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279111 + ... + 279476.

It is an arithmetic number, because the mean of its divisors is an integer number (17316228).

Almost surely, 2^102221421 is an apocalyptic number.

It is an amenable number.

102221421 is a deficient number, since it is larger than the sum of its proper divisors (36308403).

102221421 is an equidigital number, since it uses as much as digits as its factorization.

102221421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558651.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 102221421 is about 10110.4609687195. The cubic root of 102221421 is about 467.5707172804.

Adding to 102221421 its reverse (124122201), we get a palindrome (226343622).

The spelling of 102221421 in words is "one hundred two million, two hundred twenty-one thousand, four hundred twenty-one".