21201122120107 has 2 divisors, whose sum is σ = 21201122120108. Its totient is φ = 21201122120106.

The previous prime is 21201122120071. The next prime is 21201122120273. The reversal of 21201122120107 is 70102122110212.

Together with previous prime (21201122120071) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21201122120107 is a prime.

It is not a weakly prime, because it can be changed into another prime (21201122130107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600561060053 + 10600561060054.

It is an arithmetic number, because the mean of its divisors is an integer number (10600561060054).

Almost surely, 2^{21201122120107} is an apocalyptic number.

21201122120107 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201122120107 is an equidigital number, since it uses as much as digits as its factorization.

21201122120107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 22.

Adding to 21201122120107 its reverse (70102122110212), we get a palindrome (91303244230319).

The spelling of 21201122120107 in words is "twenty-one trillion, two hundred one billion, one hundred twenty-two million, one hundred twenty thousand, one hundred seven".