1002211121200 has 60 divisors (see below), whose sum is σ = 2409901629688. Its totient is φ = 400536576000.

The previous prime is 1002211121159. The next prime is 1002211121201. The reversal of 1002211121200 is 21211122001.

It is a super-2 number, since 2×1002211121200² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1002211121201) 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, 625326 + ... + 1547725.

Almost surely, 2^{1002211121200} is an apocalyptic number.

1002211121200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1002211121200 is an abundant number, since it is smaller than the sum of its proper divisors (1407690508488).

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

1002211121200 is a wasteful number, since it uses less digits than its factorization.

1002211121200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2174222 (or 2174211 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1002211121200 its reverse (21211122001), we get a palindrome (1023422243201).

The spelling of 1002211121200 in words is "one trillion, two billion, two hundred eleven million, one hundred twenty-one thousand, two hundred".