21210122112107 has 2 divisors, whose sum is σ = 21210122112108. Its totient is φ = 21210122112106.

The previous prime is 21210122112089. The next prime is 21210122112163. The reversal of 21210122112107 is 70121122101212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21210122112107 - 2¹⁶ = 21210122046571 is a prime.

It is not a weakly prime, because it can be changed into another prime (21210122112007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605061056053 + 10605061056054.

It is an arithmetic number, because the mean of its divisors is an integer number (10605061056054).

Almost surely, 2^{21210122112107} is an apocalyptic number.

21210122112107 is a deficient number, since it is larger than the sum of its proper divisors (1).

21210122112107 is an equidigital number, since it uses as much as digits as its factorization.

21210122112107 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 23.

Adding to 21210122112107 its reverse (70121122101212), we get a palindrome (91331244213319).

The spelling of 21210122112107 in words is "twenty-one trillion, two hundred ten billion, one hundred twenty-two million, one hundred twelve thousand, one hundred seven".