2121002001200 has 60 divisors (see below), whose sum is σ = 5395454813880. Its totient is φ = 798494868480.

The previous prime is 2121002001197. The next prime is 2121002001211. The reversal of 2121002001200 is 21002001212.

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, 155949230 + ... + 155962829.

It is an arithmetic number, because the mean of its divisors is an integer number (89924246898).

Almost surely, 2^{2121002001200} is an apocalyptic number.

2121002001200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121002001200 is an abundant number, since it is smaller than the sum of its proper divisors (3274452812680).

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

2121002001200 is a wasteful number, since it uses less digits than its factorization.

2121002001200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311912094 (or 311912083 counting only the distinct ones).

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

Adding to 2121002001200 its reverse (21002001212), we get a palindrome (2142004002412).

The spelling of 2121002001200 in words is "two trillion, one hundred twenty-one billion, two million, one thousand, two hundred".