21281262959233 has 8 divisors (see below), whose sum is σ = 21449720314880. Its totient is φ = 21112819484400.

The previous prime is 21281262959191. The next prime is 21281262959237. The reversal of 21281262959233 is 33295926218212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21281262959233 - 2¹³ = 21281262951041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21281262959237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 380943 + ... + 6535108.

It is an arithmetic number, because the mean of its divisors is an integer number (2681215039360).

Almost surely, 2^{21281262959233} is an apocalyptic number.

It is an amenable number.

21281262959233 is a deficient number, since it is larger than the sum of its proper divisors (168457355647).

21281262959233 is a wasteful number, since it uses less digits than its factorization.

21281262959233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6940407.

The product of its digits is 5598720, while the sum is 55.

The spelling of 21281262959233 in words is "twenty-one trillion, two hundred eighty-one billion, two hundred sixty-two million, nine hundred fifty-nine thousand, two hundred thirty-three".