2121109941 has 16 divisors (see below), whose sum is σ = 2995959744. Its totient is φ = 1330247424.

The previous prime is 2121109937. The next prime is 2121109957. The reversal of 2121109941 is 1499011212.

It is a happy number.

It is not a de Polignac number, because 2121109941 - 2² = 2121109937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2121109899 and 2121109908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121109241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110070 + ... + 127896.

It is an arithmetic number, because the mean of its divisors is an integer number (187247484).

Almost surely, 2^2121109941 is an apocalyptic number.

It is an amenable number.

2121109941 is a deficient number, since it is larger than the sum of its proper divisors (874849803).

2121109941 is a wasteful number, since it uses less digits than its factorization.

2121109941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20180.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 2121109941 is about 46055.5093447027. The cubic root of 2121109941 is about 1284.8558112626.

The spelling of 2121109941 in words is "two billion, one hundred twenty-one million, one hundred nine thousand, nine hundred forty-one".