1001200002111 has 24 divisors (see below), whose sum is σ = 1450024137744. Its totient is φ = 665691903360.

The previous prime is 1001200001999. The next prime is 1001200002133. The reversal of 1001200002111 is 1112000021001.

It is a happy number.

It is not a de Polignac number, because 1001200002111 - 2⁷ = 1001200001983 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 1001200002093 and 1001200002102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001200002191) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33346096 + ... + 33376106.

It is an arithmetic number, because the mean of its divisors is an integer number (60417672406).

Almost surely, 2^{1001200002111} is an apocalyptic number.

1001200002111 is a deficient number, since it is larger than the sum of its proper divisors (448824135633).

1001200002111 is a wasteful number, since it uses less digits than its factorization.

1001200002111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39751 (or 39748 counting only the distinct ones).

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

Adding to 1001200002111 its reverse (1112000021001), we get a palindrome (2113200023112).

The spelling of 1001200002111 in words is "one trillion, one billion, two hundred million, two thousand, one hundred eleven".