1200002100100 has 36 divisors (see below), whose sum is σ = 2604258566784. Its totient is φ = 479954018080.

The previous prime is 1200002100097. The next prime is 1200002100107. The reversal of 1200002100100 is 10012000021.

It is not an unprimeable number, because it can be changed into a prime (1200002100107) 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, 454197 + ... + 1614403.

It is an arithmetic number, because the mean of its divisors is an integer number (72340515744).

Almost surely, 2^{1200002100100} is an apocalyptic number.

1200002100100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200002100100 is an abundant number, since it is smaller than the sum of its proper divisors (1404256466684).

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

1200002100100 is a wasteful number, since it uses less digits than its factorization.

1200002100100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170564 (or 1170557 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 1200002100100 its reverse (10012000021), we get a palindrome (1210014100121).

It can be divided in two parts, 120000 and 2100100, that added together give a square (2220100 = 1490²).

The spelling of 1200002100100 in words is "one trillion, two hundred billion, two million, one hundred thousand, one hundred".