221100142 has 16 divisors (see below), whose sum is σ = 334978560. Its totient is φ = 109444608.

The previous prime is 221100133. The next prime is 221100157. The reversal of 221100142 is 241001122.

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, 235498 + ... + 236434.

It is an arithmetic number, because the mean of its divisors is an integer number (20936160).

Almost surely, 2^221100142 is an apocalyptic number.

221100142 is a deficient number, since it is larger than the sum of its proper divisors (113878418).

221100142 is a wasteful number, since it uses less digits than its factorization.

221100142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1995.

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

The square root of 221100142 is about 14869.4365057994. The cubic root of 221100142 is about 604.6856660050.

Adding to 221100142 its reverse (241001122), we get a palindrome (462101264).

The spelling of 221100142 in words is "two hundred twenty-one million, one hundred thousand, one hundred forty-two".