1100002100121 has 20 divisors (see below), whose sum is σ = 1643257341264. Its totient is φ = 733314951000.

The previous prime is 1100002100107. The next prime is 1100002100177. The reversal of 1100002100121 is 1210012000011.

It is a happy number.

It is not a de Polignac number, because 1100002100121 - 2⁷ = 1100002099993 is a prime.

It is a super-2 number, since 2×1100002100121² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1100002100191) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3227686 + ... + 3552176.

Almost surely, 2^{1100002100121} is an apocalyptic number.

It is an amenable number.

1100002100121 is a deficient number, since it is larger than the sum of its proper divisors (543255241143).

1100002100121 is an equidigital number, since it uses as much as digits as its factorization.

1100002100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366354 (or 366345 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1100002100121 its reverse (1210012000011), we get a palindrome (2310014100132).

The spelling of 1100002100121 in words is "one trillion, one hundred billion, two million, one hundred thousand, one hundred twenty-one".