20010122121100 has 18 divisors (see below), whose sum is σ = 43421965003004. Its totient is φ = 8004048848400.

The previous prime is 20010122121061. The next prime is 20010122121103. The reversal of 20010122121100 is 112122101002.

It is not an unprimeable number, because it can be changed into a prime (20010122121103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100050610506 + ... + 100050610705.

Almost surely, 2^{20010122121100} is an apocalyptic number.

20010122121100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20010122121100 is an abundant number, since it is smaller than the sum of its proper divisors (23411842881904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20010122121100 is a wasteful number, since it uses less digits than its factorization.

20010122121100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200101221225 (or 200101221218 counting only the distinct ones).

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

Adding to 20010122121100 its reverse (112122101002), we get a palindrome (20122244222102).

The spelling of 20010122121100 in words is "twenty trillion, ten billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred".