2011321121 has 2 divisors, whose sum is σ = 2011321122. Its totient is φ = 2011321120.

The previous prime is 2011321049. The next prime is 2011321127. The reversal of 2011321121 is 1211231102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1689621025 + 321700096 = 41105^2 + 17936^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2011321121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2011321096 and 2011321105.

It is not a weakly prime, because it can be changed into another prime (2011321127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005660560 + 1005660561.

It is an arithmetic number, because the mean of its divisors is an integer number (1005660561).

Almost surely, 2^2011321121 is an apocalyptic number.

It is an amenable number.

2011321121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011321121 is an equidigital number, since it uses as much as digits as its factorization.

2011321121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 2011321121 is about 44847.7549159375. The cubic root of 2011321121 is about 1262.2938647994.

Adding to 2011321121 its reverse (1211231102), we get a palindrome (3222552223).

The spelling of 2011321121 in words is "two billion, eleven million, three hundred twenty-one thousand, one hundred twenty-one".