2111001121 has 4 divisors (see below), whose sum is σ = 2111159700. Its totient is φ = 2110842544.

The previous prime is 2111001103. The next prime is 2111001133. The reversal of 2111001121 is 1211001112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1008761121 + 1102240000 = 31761^2 + 33200^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111001121 - 2⁹ = 2111000609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111001098 and 2111001107.

It is not an unprimeable number, because it can be changed into a prime (2111001161) 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, 57286 + ... + 86623.

It is an arithmetic number, because the mean of its divisors is an integer number (527789925).

Almost surely, 2^2111001121 is an apocalyptic number.

It is an amenable number.

2111001121 is a deficient number, since it is larger than the sum of its proper divisors (158579).

2111001121 is a wasteful number, since it uses less digits than its factorization.

2111001121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158578.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 2111001121 is about 45945.6322298431. The cubic root of 2111001121 is about 1282.8114312457.

Adding to 2111001121 its reverse (1211001112), we get a palindrome (3322002233).

Subtracting from 2111001121 its reverse (1211001112), we obtain a palindrome (900000009).

The spelling of 2111001121 in words is "two billion, one hundred eleven million, one thousand, one hundred twenty-one".