21001102201147 has 2 divisors, whose sum is σ = 21001102201148. Its totient is φ = 21001102201146.

The previous prime is 21001102201067. The next prime is 21001102201213. The reversal of 21001102201147 is 74110220110012.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21001102201147 - 2¹⁹ = 21001101676859 is a prime.

It is not a weakly prime, because it can be changed into another prime (21001102201447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500551100573 + 10500551100574.

It is an arithmetic number, because the mean of its divisors is an integer number (10500551100574).

Almost surely, 2^{21001102201147} is an apocalyptic number.

21001102201147 is a deficient number, since it is larger than the sum of its proper divisors (1).

21001102201147 is an equidigital number, since it uses as much as digits as its factorization.

21001102201147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 22.

Adding to 21001102201147 its reverse (74110220110012), we get a palindrome (95111322311159).

The spelling of 21001102201147 in words is "twenty-one trillion, one billion, one hundred two million, two hundred one thousand, one hundred forty-seven".