2100001211109 has 12 divisors (see below), whose sum is σ = 3165219217056. Its totient is φ = 1339131206952.

The previous prime is 2100001211107. The next prime is 2100001211117. The reversal of 2100001211109 is 9011121000012.

It is a happy number.

It is not a de Polignac number, because 2100001211109 - 2¹ = 2100001211107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2100001211091 and 2100001211100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100001211107) 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, 5072466487 + ... + 5072466900.

It is an arithmetic number, because the mean of its divisors is an integer number (263768268088).

Almost surely, 2^{2100001211109} is an apocalyptic number.

It is an amenable number.

2100001211109 is a deficient number, since it is larger than the sum of its proper divisors (1065218005947).

2100001211109 is a wasteful number, since it uses less digits than its factorization.

2100001211109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10144933416 (or 10144933413 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

The spelling of 2100001211109 in words is "two trillion, one hundred billion, one million, two hundred eleven thousand, one hundred nine".