21211200211147 has 2 divisors, whose sum is σ = 21211200211148. Its totient is φ = 21211200211146.

The previous prime is 21211200211129. The next prime is 21211200211219. The reversal of 21211200211147 is 74111200211212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21211200211147 - 2³⁵ = 21176840472779 is a prime.

It is not a weakly prime, because it can be changed into another prime (21211200211447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605600105573 + 10605600105574.

It is an arithmetic number, because the mean of its divisors is an integer number (10605600105574).

Almost surely, 2^{21211200211147} is an apocalyptic number.

21211200211147 is a deficient number, since it is larger than the sum of its proper divisors (1).

21211200211147 is an equidigital number, since it uses as much as digits as its factorization.

21211200211147 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 25.

Adding to 21211200211147 its reverse (74111200211212), we get a palindrome (95322400422359).

The spelling of 21211200211147 in words is "twenty-one trillion, two hundred eleven billion, two hundred million, two hundred eleven thousand, one hundred forty-seven".