2111231121 has 8 divisors (see below), whose sum is σ = 2825138304. Its totient is φ = 1402405680.

The previous prime is 2111231069. The next prime is 2111231123. The reversal of 2111231121 is 1211321112.

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

It is not a de Polignac number, because 2111231121 - 2⁷ = 2111230993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2111231121.

It is not an unprimeable number, because it can be changed into a prime (2111231123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1269465 + ... + 1271126.

It is an arithmetic number, because the mean of its divisors is an integer number (353142288).

Almost surely, 2^2111231121 is an apocalyptic number.

It is an amenable number.

2111231121 is a deficient number, since it is larger than the sum of its proper divisors (713907183).

2111231121 is a wasteful number, since it uses less digits than its factorization.

2111231121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2540871.

The product of its digits is 24, while the sum is 15.

The square root of 2111231121 is about 45948.1351199371. The cubic root of 2111231121 is about 1282.8580182910.

Adding to 2111231121 its reverse (1211321112), we get a palindrome (3322552233).

The spelling of 2111231121 in words is "two billion, one hundred eleven million, two hundred thirty-one thousand, one hundred twenty-one".