20211120121200 has 60 divisors (see below), whose sum is σ = 64742954792088. Its totient is φ = 5389632032000.

The previous prime is 20211120121183. The next prime is 20211120121207. The reversal of 20211120121200 is 212102111202.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20211120121200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211120121207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8421298851 + ... + 8421301250.

Almost surely, 2^{20211120121200} is an apocalyptic number.

20211120121200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20211120121200 is an abundant number, since it is smaller than the sum of its proper divisors (44531834670888).

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

20211120121200 is a wasteful number, since it uses less digits than its factorization.

20211120121200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16842600122 (or 16842600111 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20211120121200 its reverse (212102111202), we get a palindrome (20423222232402).

The spelling of 20211120121200 in words is "twenty trillion, two hundred eleven billion, one hundred twenty million, one hundred twenty-one thousand, two hundred".