2121212102011 has 4 divisors (see below), whose sum is σ = 2127290074000. Its totient is φ = 2115134130024.

The previous prime is 2121212101993. The next prime is 2121212102057. The reversal of 2121212102011 is 1102012121212.

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 2121212102011 - 2¹⁷ = 2121211970939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121212102411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3038985471 + ... + 3038986168.

It is an arithmetic number, because the mean of its divisors is an integer number (531822518500).

Almost surely, 2^{2121212102011} is an apocalyptic number.

2121212102011 is a deficient number, since it is larger than the sum of its proper divisors (6077971989).

2121212102011 is an equidigital number, since it uses as much as digits as its factorization.

2121212102011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6077971988.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2121212102011 its reverse (1102012121212), we get a palindrome (3223224223223).

It can be divided in two parts, 212121 and 2102011, that added together give a palindrome (2314132).

The spelling of 2121212102011 in words is "two trillion, one hundred twenty-one billion, two hundred twelve million, one hundred two thousand, eleven".