21261162006223 has 2 divisors, whose sum is σ = 21261162006224. Its totient is φ = 21261162006222.

The previous prime is 21261162006199. The next prime is 21261162006229. The reversal of 21261162006223 is 32260026116212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21261162006223 - 2⁹ = 21261162005711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21261162006229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10630581003111 + 10630581003112.

It is an arithmetic number, because the mean of its divisors is an integer number (10630581003112).

Almost surely, 2^{21261162006223} is an apocalyptic number.

21261162006223 is a deficient number, since it is larger than the sum of its proper divisors (1).

21261162006223 is an equidigital number, since it uses as much as digits as its factorization.

21261162006223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 34.

The spelling of 21261162006223 in words is "twenty-one trillion, two hundred sixty-one billion, one hundred sixty-two million, six thousand, two hundred twenty-three".