102221142 has 16 divisors (see below), whose sum is σ = 204565440. Its totient is φ = 34053192.

The previous prime is 102221137. The next prime is 102221149. The reversal of 102221142 is 241122201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102221149) 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, 8409 + ... + 16587.

It is an arithmetic number, because the mean of its divisors is an integer number (12785340).

Almost surely, 2^102221142 is an apocalyptic number.

102221142 is an abundant number, since it is smaller than the sum of its proper divisors (102344298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102221142 is a wasteful number, since it uses less digits than its factorization.

102221142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10267.

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

The square root of 102221142 is about 10110.4471711196. The cubic root of 102221142 is about 467.5702918890.

Adding to 102221142 its reverse (241122201), we get a palindrome (343343343).

The spelling of 102221142 in words is "one hundred two million, two hundred twenty-one thousand, one hundred forty-two".