21010002221147 has 2 divisors, whose sum is σ = 21010002221148. Its totient is φ = 21010002221146.

The previous prime is 21010002221057. The next prime is 21010002221203. The reversal of 21010002221147 is 74112220001012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21010002221147 - 2⁸ = 21010002220891 is a prime.

It is not a weakly prime, because it can be changed into another prime (21010002211147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505001110573 + 10505001110574.

It is an arithmetic number, because the mean of its divisors is an integer number (10505001110574).

Almost surely, 2^{21010002221147} is an apocalyptic number.

21010002221147 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010002221147 is an equidigital number, since it uses as much as digits as its factorization.

21010002221147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 23.

Adding to 21010002221147 its reverse (74112220001012), we get a palindrome (95122222222159).

The spelling of 21010002221147 in words is "twenty-one trillion, ten billion, two million, two hundred twenty-one thousand, one hundred forty-seven".