21201222012107 has 2 divisors, whose sum is σ = 21201222012108. Its totient is φ = 21201222012106.

The previous prime is 21201222012079. The next prime is 21201222012151. The reversal of 21201222012107 is 70121022210212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21201222012107 - 2¹² = 21201222008011 is a prime.

It is not a weakly prime, because it can be changed into another prime (21201222018107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600611006053 + 10600611006054.

It is an arithmetic number, because the mean of its divisors is an integer number (10600611006054).

Almost surely, 2^{21201222012107} is an apocalyptic number.

21201222012107 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201222012107 is an equidigital number, since it uses as much as digits as its factorization.

21201222012107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 23.

Adding to 21201222012107 its reverse (70121022210212), we get a palindrome (91322244222319).

The spelling of 21201222012107 in words is "twenty-one trillion, two hundred one billion, two hundred twenty-two million, twelve thousand, one hundred seven".