2121012121111 has 8 divisors (see below), whose sum is σ = 2306782414944. Its totient is φ = 1938472615200.

The previous prime is 2121012121027. The next prime is 2121012121139. The reversal of 2121012121111 is 1111212101212.

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

It is a cyclic number.

It is not a de Polignac number, because 2121012121111 - 2⁹ = 2121012120599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121012121411) 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, 807695611 + ... + 807698236.

It is an arithmetic number, because the mean of its divisors is an integer number (288347801868).

Almost surely, 2^{2121012121111} is an apocalyptic number.

2121012121111 is a deficient number, since it is larger than the sum of its proper divisors (185770293833).

2121012121111 is a wasteful number, since it uses less digits than its factorization.

2121012121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1615393961.

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

Adding to 2121012121111 its reverse (1111212101212), we get a palindrome (3232224222323).

It can be divided in two parts, 212101212 and 1111, that multiplied together give a palindrome (235644446532).

The spelling of 2121012121111 in words is "two trillion, one hundred twenty-one billion, twelve million, one hundred twenty-one thousand, one hundred eleven".