21211020200999 has 8 divisors (see below), whose sum is σ = 22729314348720. Its totient is φ = 19722791284096.

The previous prime is 21211020200977. The next prime is 21211020201001. The reversal of 21211020200999 is 99900202011212.

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 21211020200999 - 2⁸ = 21211020200743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211020208999) 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, 7516306244 + ... + 7516309065.

It is an arithmetic number, because the mean of its divisors is an integer number (2841164293590).

Almost surely, 2^{21211020200999} is an apocalyptic number.

21211020200999 is a deficient number, since it is larger than the sum of its proper divisors (1518294147721).

21211020200999 is a wasteful number, since it uses less digits than its factorization.

21211020200999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15032615409.

The product of its (nonzero) digits is 11664, while the sum is 38.

The spelling of 21211020200999 in words is "twenty-one trillion, two hundred eleven billion, twenty million, two hundred thousand, nine hundred ninety-nine".