2101200001011 has 12 divisors (see below), whose sum is σ = 3040676779920. Its totient is φ = 1398210718320.

The previous prime is 2101200000973. The next prime is 2101200001027. The reversal of 2101200001011 is 1101000021012.

It is a happy number.

It is not a de Polignac number, because 2101200001011 - 2¹³ = 2101199992819 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 = 2101200000984 and 2101200001002.

It is not an unprimeable number, because it can be changed into a prime (2101200001111) 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, 215768391 + ... + 215778128.

It is an arithmetic number, because the mean of its divisors is an integer number (253389731660).

Almost surely, 2^{2101200001011} is an apocalyptic number.

2101200001011 is a deficient number, since it is larger than the sum of its proper divisors (939476778909).

2101200001011 is a wasteful number, since it uses less digits than its factorization.

2101200001011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431547066 (or 431547063 counting only the distinct ones).

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

Adding to 2101200001011 its reverse (1101000021012), we get a palindrome (3202200022023).

The spelling of 2101200001011 in words is "two trillion, one hundred one billion, two hundred million, one thousand, eleven".