2121012120011 has 8 divisors (see below), whose sum is σ = 2150918963424. Its totient is φ = 2091106205440.

The previous prime is 2121012119981. The next prime is 2121012120067. The reversal of 2121012120011 is 1100212101212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121012120011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121012120211) 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 7 ways as a sum of consecutive naturals, for example, 5284265 + ... + 5671461.

It is an arithmetic number, because the mean of its divisors is an integer number (268864870428).

Almost surely, 2^{2121012120011} is an apocalyptic number.

2121012120011 is a deficient number, since it is larger than the sum of its proper divisors (29906843413).

2121012120011 is an equidigital number, since it uses as much as digits as its factorization.

2121012120011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464421.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2121012120011 its reverse (1100212101212), we get a palindrome (3221224221223).

The spelling of 2121012120011 in words is "two trillion, one hundred twenty-one billion, twelve million, one hundred twenty thousand, eleven".