21200220219907 has 2 divisors, whose sum is σ = 21200220219908. Its totient is φ = 21200220219906.

The previous prime is 21200220219889. The next prime is 21200220220057. The reversal of 21200220219907 is 70991202200212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21200220219907 - 2⁷ = 21200220219779 is a prime.

It is not a weakly prime, because it can be changed into another prime (21200220219307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600110109953 + 10600110109954.

It is an arithmetic number, because the mean of its divisors is an integer number (10600110109954).

Almost surely, 2^{21200220219907} is an apocalyptic number.

21200220219907 is a deficient number, since it is larger than the sum of its proper divisors (1).

21200220219907 is an equidigital number, since it uses as much as digits as its factorization.

21200220219907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 21200220219907 in words is "twenty-one trillion, two hundred billion, two hundred twenty million, two hundred nineteen thousand, nine hundred seven".