2123606651 has 2 divisors, whose sum is σ = 2123606652. Its totient is φ = 2123606650.

The previous prime is 2123606623. The next prime is 2123606657. The reversal of 2123606651 is 1566063212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2123606651 - 2¹⁸ = 2123344507 is a prime.

It is not a weakly prime, because it can be changed into another prime (2123606657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061803325 + 1061803326.

It is an arithmetic number, because the mean of its divisors is an integer number (1061803326).

Almost surely, 2^2123606651 is an apocalyptic number.

2123606651 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123606651 is an equidigital number, since it uses as much as digits as its factorization.

2123606651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 2123606651 is about 46082.6068164552. The cubic root of 2123606651 is about 1285.3597383904.

Adding to 2123606651 its reverse (1566063212), we get a palindrome (3689669863).

The spelling of 2123606651 in words is "two billion, one hundred twenty-three million, six hundred six thousand, six hundred fifty-one".