102221191 has 8 divisors (see below), whose sum is σ = 105638544. Its totient is φ = 98851200.

The previous prime is 102221183. The next prime is 102221209. The reversal of 102221191 is 191122201.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 102221191 - 2³ = 102221183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102221101) 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, 7426 + ... + 16111.

It is an arithmetic number, because the mean of its divisors is an integer number (13204818).

Almost surely, 2^102221191 is an apocalyptic number.

102221191 is a deficient number, since it is larger than the sum of its proper divisors (3417353).

102221191 is a wasteful number, since it uses less digits than its factorization.

102221191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23681.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 102221191 is about 10110.4495943553. The cubic root of 102221191 is about 467.5703665993.

Adding to 102221191 its reverse (191122201), we get a palindrome (293343392).

The spelling of 102221191 in words is "one hundred two million, two hundred twenty-one thousand, one hundred ninety-one".