2101331121 has 32 divisors (see below), whose sum is σ = 3104396928. Its totient is φ = 1258583040.

The previous prime is 2101331081. The next prime is 2101331137. The reversal of 2101331121 is 1211331012.

It is a happy number.

It is not a de Polignac number, because 2101331121 - 2⁷ = 2101330993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2101331121.

It is not an unprimeable number, because it can be changed into a prime (2101331521) 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 31 ways as a sum of consecutive naturals, for example, 89506 + ... + 110516.

It is an arithmetic number, because the mean of its divisors is an integer number (97012404).

Almost surely, 2^2101331121 is an apocalyptic number.

It is an amenable number.

2101331121 is a deficient number, since it is larger than the sum of its proper divisors (1003065807).

2101331121 is a wasteful number, since it uses less digits than its factorization.

2101331121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21121.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 2101331121 is about 45840.2783695736. The cubic root of 2101331121 is about 1280.8496801908.

Adding to 2101331121 its reverse (1211331012), we get a palindrome (3312662133).

It can be divided in two parts, 210 and 1331121, that added together give a palindrome (1331331).

The spelling of 2101331121 in words is "two billion, one hundred one million, three hundred thirty-one thousand, one hundred twenty-one".