21112020000047 has 2 divisors, whose sum is σ = 21112020000048. Its totient is φ = 21112020000046.

The previous prime is 21112020000007. The next prime is 21112020000179. The reversal of 21112020000047 is 74000002021112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21112020000047 - 2²⁴ = 21112003222831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21112019999983 and 21112020000028.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21112020000007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556010000023 + 10556010000024.

It is an arithmetic number, because the mean of its divisors is an integer number (10556010000024).

Almost surely, 2^{21112020000047} is an apocalyptic number.

21112020000047 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112020000047 is an equidigital number, since it uses as much as digits as its factorization.

21112020000047 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 20.

Adding to 21112020000047 its reverse (74000002021112), we get a palindrome (95112022021159).

The spelling of 21112020000047 in words is "twenty-one trillion, one hundred twelve billion, twenty million, forty-seven", and thus it is an aban number.