21210012212099 has 2 divisors, whose sum is σ = 21210012212100. Its totient is φ = 21210012212098.

The previous prime is 21210012212093. The next prime is 21210012212149. The reversal of 21210012212099 is 99021221001212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21210012212099 is a prime.

It is not a weakly prime, because it can be changed into another prime (21210012212093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605006106049 + 10605006106050.

It is an arithmetic number, because the mean of its divisors is an integer number (10605006106050).

Almost surely, 2^{21210012212099} is an apocalyptic number.

21210012212099 is a deficient number, since it is larger than the sum of its proper divisors (1).

21210012212099 is an equidigital number, since it uses as much as digits as its factorization.

21210012212099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 32.

The spelling of 21210012212099 in words is "twenty-one trillion, two hundred ten billion, twelve million, two hundred twelve thousand, ninety-nine".