20121010100122 has 8 divisors (see below), whose sum is σ = 30189463940916. Its totient is φ = 10057855453152.

The previous prime is 20121010100071. The next prime is 20121010100129. The reversal of 20121010100122 is 22100101012102.

It can be written as a sum of positive squares in 2 ways, for example, as 15241598594401 + 4879411505721 = 3904049^2 + 2208939^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20121010100129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1324788963 + ... + 1324804150.

Almost surely, 2^{20121010100122} is an apocalyptic number.

20121010100122 is a deficient number, since it is larger than the sum of its proper divisors (10068453840794).

20121010100122 is a wasteful number, since it uses less digits than its factorization.

20121010100122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2649596912.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20121010100122 its reverse (22100101012102), we get a palindrome (42221111112224).

The spelling of 20121010100122 in words is "twenty trillion, one hundred twenty-one billion, ten million, one hundred thousand, one hundred twenty-two".