100021142 has 16 divisors (see below), whose sum is σ = 163522800. Its totient is φ = 45606432.

The previous prime is 100021133. The next prime is 100021153. The reversal of 100021142 is 241120001.

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, 21017 + ... + 25332.

It is an arithmetic number, because the mean of its divisors is an integer number (10220175).

Almost surely, 2^100021142 is an apocalyptic number.

100021142 is a deficient number, since it is larger than the sum of its proper divisors (63501658).

100021142 is a wasteful number, since it uses less digits than its factorization.

100021142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46447.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 100021142 is about 10001.0570441329. The cubic root of 100021142 is about 464.1915918800.

Adding to 100021142 its reverse (241120001), we get a palindrome (341141143).

The spelling of 100021142 in words is "one hundred million, twenty-one thousand, one hundred forty-two".