102221501 has 4 divisors (see below), whose sum is σ = 107601600. Its totient is φ = 96841404.

The previous prime is 102221479. The next prime is 102221513. The reversal of 102221501 is 105122201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 102221501 - 2⁶ = 102221437 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 (102221531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2690021 + ... + 2690058.

It is an arithmetic number, because the mean of its divisors is an integer number (26900400).

Almost surely, 2^102221501 is an apocalyptic number.

It is an amenable number.

102221501 is a deficient number, since it is larger than the sum of its proper divisors (5380099).

102221501 is an equidigital number, since it uses as much as digits as its factorization.

102221501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5380098.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 102221501 is about 10110.4649250170. The cubic root of 102221501 is about 467.5708392563.

Adding to 102221501 its reverse (105122201), we get a palindrome (207343702).

The spelling of 102221501 in words is "one hundred two million, two hundred twenty-one thousand, five hundred one".