20120102121200 has 60 divisors (see below), whose sum is σ = 48605609307528. Its totient is φ = 8003576505600.

The previous prime is 20120102121139. The next prime is 20120102121253. The reversal of 20120102121200 is 212120102102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138878582 + ... + 139023381.

Almost surely, 2^{20120102121200} is an apocalyptic number.

20120102121200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120102121200 is an abundant number, since it is smaller than the sum of its proper divisors (28485507186328).

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

20120102121200 is a wasteful number, since it uses less digits than its factorization.

20120102121200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277902162 (or 277902151 counting only the distinct ones).

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

Adding to 20120102121200 its reverse (212120102102), we get a palindrome (20332222223302).

The spelling of 20120102121200 in words is "twenty trillion, one hundred twenty billion, one hundred two million, one hundred twenty-one thousand, two hundred".