1200002101101 has 16 divisors (see below), whose sum is σ = 1819124633920. Its totient is φ = 781396716240.

The previous prime is 1200002101069. The next prime is 1200002101139. The reversal of 1200002101101 is 1011012000021.

It is a happy number.

It is not a de Polignac number, because 1200002101101 - 2⁵ = 1200002101069 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200002108101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 516795610 + ... + 516797931.

It is an arithmetic number, because the mean of its divisors is an integer number (113695289620).

Almost surely, 2^{1200002101101} is an apocalyptic number.

It is an amenable number.

1200002101101 is a deficient number, since it is larger than the sum of its proper divisors (619122532819).

1200002101101 is a wasteful number, since it uses less digits than its factorization.

1200002101101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1033593593 (or 1033593587 counting only the distinct ones).

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

Adding to 1200002101101 its reverse (1011012000021), we get a palindrome (2211014101122).

The spelling of 1200002101101 in words is "one trillion, two hundred billion, two million, one hundred one thousand, one hundred one".