2121011043 has 4 divisors (see below), whose sum is σ = 2828014728. Its totient is φ = 1414007360.

The previous prime is 2121010973. The next prime is 2121011071. The reversal of 2121011043 is 3401101212.

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 2121011043 - 2²⁸ = 1852575587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121011143) 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, 353501838 + ... + 353501843.

It is an arithmetic number, because the mean of its divisors is an integer number (707003682).

Almost surely, 2^2121011043 is an apocalyptic number.

2121011043 is a deficient number, since it is larger than the sum of its proper divisors (707003685).

2121011043 is an equidigital number, since it uses as much as digits as its factorization.

2121011043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707003684.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 2121011043 is about 46054.4356495658. The cubic root of 2121011043 is about 1284.8358418993.

Adding to 2121011043 its reverse (3401101212), we get a palindrome (5522112255).

The spelling of 2121011043 in words is "two billion, one hundred twenty-one million, eleven thousand, forty-three".