100221142 has 16 divisors (see below), whose sum is σ = 172265472. Its totient is φ = 42837480.

The previous prime is 100221139. The next prime is 100221193. The reversal of 100221142 is 241122001.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3984 + ... + 14707.

It is an arithmetic number, because the mean of its divisors is an integer number (10766592).

Almost surely, 2^100221142 is an apocalyptic number.

100221142 is a deficient number, since it is larger than the sum of its proper divisors (72044330).

100221142 is a wasteful number, since it uses less digits than its factorization.

100221142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19083.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 100221142 is about 10011.0509937768. The cubic root of 100221142 is about 464.5007815375.

Adding to 100221142 its reverse (241122001), we get a palindrome (341343143).

The spelling of 100221142 in words is "one hundred million, two hundred twenty-one thousand, one hundred forty-two".