2121012130111 has 24 divisors (see below), whose sum is σ = 2484152841600. Its totient is φ = 1805595285312.

The previous prime is 2121012130073. The next prime is 2121012130207. The reversal of 2121012130111 is 1110312101212.

It is a happy number.

It is not a de Polignac number, because 2121012130111 - 2¹¹ = 2121012128063 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 (2121012131111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 109191346 + ... + 109210768.

It is an arithmetic number, because the mean of its divisors is an integer number (103506368400).

Almost surely, 2^{2121012130111} is an apocalyptic number.

2121012130111 is a deficient number, since it is larger than the sum of its proper divisors (363140711489).

2121012130111 is a wasteful number, since it uses less digits than its factorization.

2121012130111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34543 (or 34536 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 2121012130111 its reverse (1110312101212), we get a palindrome (3231324231323).

The spelling of 2121012130111 in words is "two trillion, one hundred twenty-one billion, twelve million, one hundred thirty thousand, one hundred eleven".