21112020001073 has 2 divisors, whose sum is σ = 21112020001074. Its totient is φ = 21112020001072.

The previous prime is 21112020000989. The next prime is 21112020001159. The reversal of 21112020001073 is 37010002021112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12618572421169 + 8493447579904 = 3552263^2 + 2914352^2 .

It is a cyclic number.

It is not a de Polignac number, because 21112020001073 - 2³² = 21107725033777 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 (21112020001273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556010000536 + 10556010000537.

It is an arithmetic number, because the mean of its divisors is an integer number (10556010000537).

Almost surely, 2^{21112020001073} is an apocalyptic number.

It is an amenable number.

21112020001073 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112020001073 is an equidigital number, since it uses as much as digits as its factorization.

21112020001073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 20.

Adding to 21112020001073 its reverse (37010002021112), we get a palindrome (58122022022185).

The spelling of 21112020001073 in words is "twenty-one trillion, one hundred twelve billion, twenty million, one thousand, seventy-three".