21225752711 has 2 divisors, whose sum is σ = 21225752712. Its totient is φ = 21225752710.

The previous prime is 21225752633. The next prime is 21225752729. The reversal of 21225752711 is 11725752212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21225752711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21225752411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10612876355 + 10612876356.

It is an arithmetic number, because the mean of its divisors is an integer number (10612876356).

Almost surely, 2^21225752711 is an apocalyptic number.

21225752711 is a deficient number, since it is larger than the sum of its proper divisors (1).

21225752711 is an equidigital number, since it uses as much as digits as its factorization.

21225752711 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19600, while the sum is 35.

The spelling of 21225752711 in words is "twenty-one billion, two hundred twenty-five million, seven hundred fifty-two thousand, seven hundred eleven".