2123081101 has 2 divisors, whose sum is σ = 2123081102. Its totient is φ = 2123081100.

The previous prime is 2123081083. The next prime is 2123081137. The reversal of 2123081101 is 1011803212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1244255076 + 878826025 = 35274^2 + 29645^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123081101 - 2⁵ = 2123081069 is a prime.

It is a super-2 number, since 2×2123081101² = 9014946722846744402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2123087101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061540550 + 1061540551.

It is an arithmetic number, because the mean of its divisors is an integer number (1061540551).

Almost surely, 2^2123081101 is an apocalyptic number.

It is an amenable number.

2123081101 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123081101 is an equidigital number, since it uses as much as digits as its factorization.

2123081101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 2123081101 is about 46076.9042037331. The cubic root of 2123081101 is about 1285.2536960679.

Adding to 2123081101 its reverse (1011803212), we get a palindrome (3134884313).

The spelling of 2123081101 in words is "two billion, one hundred twenty-three million, eighty-one thousand, one hundred one".