20021100122 has 8 divisors (see below), whose sum is σ = 31337374176. Its totient is φ = 9575308732.

The previous prime is 20021100119. The next prime is 20021100137. The reversal of 20021100122 is 22100112002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217620608 + ... + 217620699.

It is an arithmetic number, because the mean of its divisors is an integer number (3917171772).

Almost surely, 2^20021100122 is an apocalyptic number.

20021100122 is a deficient number, since it is larger than the sum of its proper divisors (11316274054).

20021100122 is a wasteful number, since it uses less digits than its factorization.

20021100122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435241332.

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

Adding to 20021100122 its reverse (22100112002), we get a palindrome (42121212124).

The spelling of 20021100122 in words is "twenty billion, twenty-one million, one hundred thousand, one hundred twenty-two".