20110120021200 has 240 divisors, whose sum is σ = 73331196074496. Its totient is φ = 4663216166400.

The previous prime is 20110120021183. The next prime is 20110120021259. The reversal of 20110120021200 is 212002101102.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32815834 + ... + 33423033.

Almost surely, 2^{20110120021200} is an apocalyptic number.

20110120021200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20110120021200 is an abundant number, since it is smaller than the sum of its proper divisors (53221076053296).

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

20110120021200 is a wasteful number, since it uses less digits than its factorization.

20110120021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66238922 (or 66238911 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20110120021200 its reverse (212002101102), we get a palindrome (20322122122302).

The spelling of 20110120021200 in words is "twenty trillion, one hundred ten billion, one hundred twenty million, twenty-one thousand, two hundred".