21221286359 has 8 divisors (see below), whose sum is σ = 26118506400. Its totient is φ = 16790468256.

The previous prime is 21221286293. The next prime is 21221286403. The reversal of 21221286359 is 95368212212.

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 21221286359 - 2⁸ = 21221286103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21221286659) 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, 116600384 + ... + 116600565.

It is an arithmetic number, because the mean of its divisors is an integer number (3264813300).

Almost surely, 2^21221286359 is an apocalyptic number.

21221286359 is a deficient number, since it is larger than the sum of its proper divisors (4897220041).

21221286359 is a wasteful number, since it uses less digits than its factorization.

21221286359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233200969.

The product of its digits is 103680, while the sum is 41.

The spelling of 21221286359 in words is "twenty-one billion, two hundred twenty-one million, two hundred eighty-six thousand, three hundred fifty-nine".