102221197 has 16 divisors (see below), whose sum is σ = 116242560. Its totient is φ = 89111232.

The previous prime is 102221183. The next prime is 102221209. The reversal of 102221197 is 791122201.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102221197 is a prime.

It is a super-2 number, since 2×102221197² = 20898346232225618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102221117) 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, 137208 + ... + 137950.

It is an arithmetic number, because the mean of its divisors is an integer number (7265160).

Almost surely, 2^102221197 is an apocalyptic number.

It is an amenable number.

102221197 is a deficient number, since it is larger than the sum of its proper divisors (14021363).

102221197 is a wasteful number, since it uses less digits than its factorization.

102221197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 102221197 is about 10110.4498910780. The cubic root of 102221197 is about 467.5703757475.

Adding to 102221197 its reverse (791122201), we get a palindrome (893343398).

The spelling of 102221197 in words is "one hundred two million, two hundred twenty-one thousand, one hundred ninety-seven".