220021110020009 has 2 divisors, whose sum is σ = 220021110020010. Its totient is φ = 220021110020008.

The previous prime is 220021110019961. The next prime is 220021110020027. The reversal of 220021110020009 is 900020011120022.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 218847198445225 + 1173911574784 = 14793485^2 + 1083472^2 .

It is a cyclic number.

It is not a de Polignac number, because 220021110020009 - 2¹⁶ = 220021109954473 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (220021110020029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110010555010004 + 110010555010005.

It is an arithmetic number, because the mean of its divisors is an integer number (110010555010005).

Almost surely, 2^{220021110020009} is an apocalyptic number.

It is an amenable number.

220021110020009 is a deficient number, since it is larger than the sum of its proper divisors (1).

220021110020009 is an equidigital number, since it uses as much as digits as its factorization.

220021110020009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 220021110020009 in words is "two hundred twenty trillion, twenty-one billion, one hundred ten million, twenty thousand, nine".