100021221092 has 12 divisors (see below), whose sum is σ = 188501532156. Its totient is φ = 46163640480.

The previous prime is 100021221077. The next prime is 100021221119. The reversal of 100021221092 is 290122120001.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14386563136 + 85634657956 = 119944^2 + 292634^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 961742459 + ... + 961742562.

It is an arithmetic number, because the mean of its divisors is an integer number (15708461013).

Almost surely, 2^100021221092 is an apocalyptic number.

It is an amenable number.

100021221092 is a deficient number, since it is larger than the sum of its proper divisors (88480311064).

100021221092 is a wasteful number, since it uses less digits than its factorization.

100021221092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1923485038 (or 1923485036 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 100021221092 its reverse (290122120001), we get a palindrome (390143341093).

The spelling of 100021221092 in words is "one hundred billion, twenty-one million, two hundred twenty-one thousand, ninety-two".