21001312223107 has 2 divisors, whose sum is σ = 21001312223108. Its totient is φ = 21001312223106.

The previous prime is 21001312223093. The next prime is 21001312223137. The reversal of 21001312223107 is 70132221310012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21001312223107 - 2³¹ = 20999164739459 is a prime.

It is not a weakly prime, because it can be changed into another prime (21001312223137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500656111553 + 10500656111554.

It is an arithmetic number, because the mean of its divisors is an integer number (10500656111554).

Almost surely, 2^{21001312223107} is an apocalyptic number.

21001312223107 is a deficient number, since it is larger than the sum of its proper divisors (1).

21001312223107 is an equidigital number, since it uses as much as digits as its factorization.

21001312223107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

Adding to 21001312223107 its reverse (70132221310012), we get a palindrome (91133533533119).

The spelling of 21001312223107 in words is "twenty-one trillion, one billion, three hundred twelve million, two hundred twenty-three thousand, one hundred seven".