21201110110007 has 2 divisors, whose sum is σ = 21201110110008. Its totient is φ = 21201110110006.

The previous prime is 21201110109943. The next prime is 21201110110009. The reversal of 21201110110007 is 70001101110212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21201110110007 - 2⁶ = 21201110109943 is a prime.

Together with 21201110110009, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21201110110009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600555055003 + 10600555055004.

It is an arithmetic number, because the mean of its divisors is an integer number (10600555055004).

Almost surely, 2^{21201110110007} is an apocalyptic number.

21201110110007 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201110110007 is an equidigital number, since it uses as much as digits as its factorization.

21201110110007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28, while the sum is 17.

Adding to 21201110110007 its reverse (70001101110212), we get a palindrome (91202211220219).

The spelling of 21201110110007 in words is "twenty-one trillion, two hundred one billion, one hundred ten million, one hundred ten thousand, seven".