2121623711 has 2 divisors, whose sum is σ = 2121623712. Its totient is φ = 2121623710.

The previous prime is 2121623659. The next prime is 2121623723. The reversal of 2121623711 is 1173261212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121623711 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121626711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060811855 + 1060811856.

It is an arithmetic number, because the mean of its divisors is an integer number (1060811856).

Almost surely, 2^2121623711 is an apocalyptic number.

2121623711 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121623711 is an equidigital number, since it uses as much as digits as its factorization.

2121623711 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 26.

The square root of 2121623711 is about 46061.0867327292. The cubic root of 2121623711 is about 1284.9595410861.

Adding to 2121623711 its reverse (1173261212), we get a palindrome (3294884923).

The spelling of 2121623711 in words is "two billion, one hundred twenty-one million, six hundred twenty-three thousand, seven hundred eleven".