2102120012011 has 4 divisors (see below), whose sum is σ = 2212757907400. Its totient is φ = 1991482116624.

The previous prime is 2102120011951. The next prime is 2102120012053. The reversal of 2102120012011 is 1102100212012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2102120012011 - 2¹¹ = 2102120009963 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2102120011982 and 2102120012000.

It is not an unprimeable number, because it can be changed into a prime (2102120012071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55318947666 + ... + 55318947703.

It is an arithmetic number, because the mean of its divisors is an integer number (553189476850).

Almost surely, 2^{2102120012011} is an apocalyptic number.

2102120012011 is a deficient number, since it is larger than the sum of its proper divisors (110637895389).

2102120012011 is a wasteful number, since it uses less digits than its factorization.

2102120012011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110637895388.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2102120012011 its reverse (1102100212012), we get a palindrome (3204220224023).

The spelling of 2102120012011 in words is "two trillion, one hundred two billion, one hundred twenty million, twelve thousand, eleven".