2123442077 has 2 divisors, whose sum is σ = 2123442078. Its totient is φ = 2123442076.

The previous prime is 2123442073. The next prime is 2123442119. The reversal of 2123442077 is 7702443212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1262665156 + 860776921 = 35534^2 + 29339^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123442077 - 2² = 2123442073 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2123442073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061721038 + 1061721039.

It is an arithmetic number, because the mean of its divisors is an integer number (1061721039).

Almost surely, 2^2123442077 is an apocalyptic number.

It is an amenable number.

2123442077 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123442077 is an equidigital number, since it uses as much as digits as its factorization.

2123442077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18816, while the sum is 32.

The square root of 2123442077 is about 46080.8211406872. The cubic root of 2123442077 is about 1285.3265335189.

Adding to 2123442077 its reverse (7702443212), we get a palindrome (9825885289).

The spelling of 2123442077 in words is "two billion, one hundred twenty-three million, four hundred forty-two thousand, seventy-seven".