2123038961 has 2 divisors, whose sum is σ = 2123038962. Its totient is φ = 2123038960.

The previous prime is 2123038933. The next prime is 2123038991. The reversal of 2123038961 is 1698303212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2121523600 + 1515361 = 46060^2 + 1231^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2123038961 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (2123038901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061519480 + 1061519481.

It is an arithmetic number, because the mean of its divisors is an integer number (1061519481).

Almost surely, 2^2123038961 is an apocalyptic number.

It is an amenable number.

2123038961 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123038961 is an equidigital number, since it uses as much as digits as its factorization.

2123038961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 2123038961 is about 46076.4469224787. The cubic root of 2123038961 is about 1285.2451925540.

The spelling of 2123038961 in words is "two billion, one hundred twenty-three million, thirty-eight thousand, nine hundred sixty-one".