21223321293 has 8 divisors (see below), whose sum is σ = 28312561728. Its totient is φ = 14141480864.

The previous prime is 21223321291. The next prime is 21223321297. The reversal of 21223321293 is 39212332212.

It is a happy number.

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 21223321293 - 2¹ = 21223321291 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21223321293.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223321291) 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, 1843305 + ... + 1854782.

It is an arithmetic number, because the mean of its divisors is an integer number (3539070216).

Almost surely, 2^21223321293 is an apocalyptic number.

It is an amenable number.

21223321293 is a deficient number, since it is larger than the sum of its proper divisors (7089240435).

21223321293 is a wasteful number, since it uses less digits than its factorization.

21223321293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3700003.

The product of its digits is 7776, while the sum is 30.

The spelling of 21223321293 in words is "twenty-one billion, two hundred twenty-three million, three hundred twenty-one thousand, two hundred ninety-three".