21020110010047 has 2 divisors, whose sum is σ = 21020110010048. Its totient is φ = 21020110010046.

The previous prime is 21020110010033. The next prime is 21020110010057. The reversal of 21020110010047 is 74001001102012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21020110010047 - 2⁴³ = 12224016987839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21020110010027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510055005023 + 10510055005024.

It is an arithmetic number, because the mean of its divisors is an integer number (10510055005024).

Almost surely, 2^{21020110010047} is an apocalyptic number.

21020110010047 is a deficient number, since it is larger than the sum of its proper divisors (1).

21020110010047 is an equidigital number, since it uses as much as digits as its factorization.

21020110010047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 19.

Adding to 21020110010047 its reverse (74001001102012), we get a palindrome (95021111112059).

The spelling of 21020110010047 in words is "twenty-one trillion, twenty billion, one hundred ten million, ten thousand, forty-seven".