102220221 has 16 divisors (see below), whose sum is σ = 139209984. Its totient is φ = 66703104.

The previous prime is 102220207. The next prime is 102220231. The reversal of 102220221 is 122022201.

It is not a de Polignac number, because 102220221 - 2⁹ = 102219709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102220197 and 102220206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102220231) 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, 28300 + ... + 31706.

It is an arithmetic number, because the mean of its divisors is an integer number (8700624).

Almost surely, 2^102220221 is an apocalyptic number.

It is an amenable number.

102220221 is a deficient number, since it is larger than the sum of its proper divisors (36989763).

102220221 is a wasteful number, since it uses less digits than its factorization.

102220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3620.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 102220221 is about 10110.4016240701. The cubic root of 102220221 is about 467.5688876343.

Adding to 102220221 its reverse (122022201), we get a palindrome (224242422).

The spelling of 102220221 in words is "one hundred two million, two hundred twenty thousand, two hundred twenty-one".