21311201121107 has 2 divisors, whose sum is σ = 21311201121108. Its totient is φ = 21311201121106.

The previous prime is 21311201121097. The next prime is 21311201121121. The reversal of 21311201121107 is 70112110211312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21311201121107 - 2⁸ = 21311201120851 is a prime.

It is not a weakly prime, because it can be changed into another prime (21311201124107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10655600560553 + 10655600560554.

It is an arithmetic number, because the mean of its divisors is an integer number (10655600560554).

Almost surely, 2^{21311201121107} is an apocalyptic number.

21311201121107 is a deficient number, since it is larger than the sum of its proper divisors (1).

21311201121107 is an equidigital number, since it uses as much as digits as its factorization.

21311201121107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 23.

Adding to 21311201121107 its reverse (70112110211312), we get a palindrome (91423311332419).

The spelling of 21311201121107 in words is "twenty-one trillion, three hundred eleven billion, two hundred one million, one hundred twenty-one thousand, one hundred seven".