21201122201099 has 2 divisors, whose sum is σ = 21201122201100. Its totient is φ = 21201122201098.

The previous prime is 21201122201057. The next prime is 21201122201113. The reversal of 21201122201099 is 99010222110212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21201122201099 is a prime.

It is not a weakly prime, because it can be changed into another prime (21201122501099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600561100549 + 10600561100550.

It is an arithmetic number, because the mean of its divisors is an integer number (10600561100550).

Almost surely, 2^{21201122201099} is an apocalyptic number.

21201122201099 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201122201099 is an equidigital number, since it uses as much as digits as its factorization.

21201122201099 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 21201122201099 in words is "twenty-one trillion, two hundred one billion, one hundred twenty-two million, two hundred one thousand, ninety-nine".