21210123403299 has 8 divisors (see below), whose sum is σ = 29255342625360. Its totient is φ = 13652493225056.

The previous prime is 21210123403267. The next prime is 21210123403303. The reversal of 21210123403299 is 99230432101212.

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 21210123403299 - 2⁵ = 21210123403267 is a prime.

It is a super-3 number, since 3×21210123403299³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21210123403199) 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, 121897260852 + ... + 121897261025.

It is an arithmetic number, because the mean of its divisors is an integer number (3656917828170).

Almost surely, 2^{21210123403299} is an apocalyptic number.

21210123403299 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

21210123403299 is a deficient number, since it is larger than the sum of its proper divisors (8045219222061).

21210123403299 is a wasteful number, since it uses less digits than its factorization.

21210123403299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243794521909.

The product of its (nonzero) digits is 46656, while the sum is 39.

The spelling of 21210123403299 in words is "twenty-one trillion, two hundred ten billion, one hundred twenty-three million, four hundred three thousand, two hundred ninety-nine".