20122121212100 has 72 divisors (see below), whose sum is σ = 44407270773600. Its totient is φ = 7912038355200.

The previous prime is 20122121212073. The next prime is 20122121212103. The reversal of 20122121212100 is 121212122102.

It is not an unprimeable number, because it can be changed into a prime (20122121212103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 139693115 + ... + 139837085.

Almost surely, 2^{20122121212100} is an apocalyptic number.

20122121212100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20122121212100 is an abundant number, since it is smaller than the sum of its proper divisors (24285149561500).

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

20122121212100 is a wasteful number, since it uses less digits than its factorization.

20122121212100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167733 (or 167726 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20122121212100 its reverse (121212122102), we get a palindrome (20243333334202).

The spelling of 20122121212100 in words is "twenty trillion, one hundred twenty-two billion, one hundred twenty-one million, two hundred twelve thousand, one hundred".