21210200010999 has 6 divisors (see below), whose sum is σ = 30636955571456. Its totient is φ = 14140133340660.

The previous prime is 21210200010971. The next prime is 21210200011051. The reversal of 21210200010999 is 99901000201212.

It is not a de Polignac number, because 21210200010999 - 2⁹ = 21210200010487 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 (21210200010929) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1178344445047 + ... + 1178344445064.

Almost surely, 2^{21210200010999} is an apocalyptic number.

21210200010999 is a deficient number, since it is larger than the sum of its proper divisors (9426755560457).

21210200010999 is a wasteful number, since it uses less digits than its factorization.

21210200010999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2356688890117 (or 2356688890114 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The spelling of 21210200010999 in words is "twenty-one trillion, two hundred ten billion, two hundred million, ten thousand, nine hundred ninety-nine".