21043226511 has 12 divisors (see below), whose sum is σ = 30398235192. Its totient is φ = 14027680656.

The previous prime is 21043226509. The next prime is 21043226513. The reversal of 21043226511 is 11562234012.

21043226511 is a `hidden beast` number, since 2 + 1 + 0 + 4 + 3 + 2 + 2 + 651 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (21043226509) and next prime (21043226513).

It is not a de Polignac number, because 21043226511 - 2¹ = 21043226509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21043226513) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31285 + ... + 207521.

It is an arithmetic number, because the mean of its divisors is an integer number (2533186266).

Almost surely, 2^21043226511 is an apocalyptic number.

21043226511 is a deficient number, since it is larger than the sum of its proper divisors (9355008681).

21043226511 is a wasteful number, since it uses less digits than its factorization.

21043226511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189510 (or 189507 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The spelling of 21043226511 in words is "twenty-one billion, forty-three million, two hundred twenty-six thousand, five hundred eleven".