20121120200120 has 32 divisors (see below), whose sum is σ = 45287516588400. Its totient is φ = 8045782099968.

The previous prime is 20121120200063. The next prime is 20121120200261. The reversal of 20121120200120 is 2100202112102.

It is a junction number, because it is equal to n+sod(n) for n = 20121120200095 and 20121120200104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83189609 + ... + 83431128.

Almost surely, 2^{20121120200120} is an apocalyptic number.

20121120200120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20121120200120 is an abundant number, since it is smaller than the sum of its proper divisors (25166396388280).

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

20121120200120 is a wasteful number, since it uses less digits than its factorization.

20121120200120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166623767 (or 166623763 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20121120200120 its reverse (2100202112102), we get a palindrome (22221322312222).

The spelling of 20121120200120 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty million, two hundred thousand, one hundred twenty".