20121002001200 has 60 divisors (see below), whose sum is σ = 49002908848968. Its totient is φ = 7938148723200.

The previous prime is 20121002001167. The next prime is 20121002001277. The reversal of 20121002001200 is 210020012102.

It is a happy 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, 344508506 + ... + 344566905.

Almost surely, 2^{20121002001200} is an apocalyptic number.

20121002001200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20121002001200 is an abundant number, since it is smaller than the sum of its proper divisors (28881906847768).

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

20121002001200 is a wasteful number, since it uses less digits than its factorization.

20121002001200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689075502 (or 689075491 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20121002001200 its reverse (210020012102), we get a palindrome (20331022013302).

The spelling of 20121002001200 in words is "twenty trillion, one hundred twenty-one billion, two million, one thousand, two hundred".