2111023121 has 2 divisors, whose sum is σ = 2111023122. Its totient is φ = 2111023120.

The previous prime is 2111023067. The next prime is 2111023147. The reversal of 2111023121 is 1213201112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1471489600 + 639533521 = 38360^2 + 25289^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2111023121 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2111023096 and 2111023105.

It is not a weakly prime, because it can be changed into another prime (2111023171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055511560 + 1055511561.

It is an arithmetic number, because the mean of its divisors is an integer number (1055511561).

Almost surely, 2^2111023121 is an apocalyptic number.

It is an amenable number.

2111023121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111023121 is an equidigital number, since it uses as much as digits as its factorization.

2111023121 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 2111023121 is about 45945.8716426188. The cubic root of 2111023121 is about 1282.8158875442.

Adding to 2111023121 its reverse (1213201112), we get a palindrome (3324224233).

The spelling of 2111023121 in words is "two billion, one hundred eleven million, twenty-three thousand, one hundred twenty-one".