21211110200047 has 2 divisors, whose sum is σ = 21211110200048. Its totient is φ = 21211110200046.

The previous prime is 21211110199921. The next prime is 21211110200131. The reversal of 21211110200047 is 74000201111212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21211110200047 - 2⁷ = 21211110199919 is a prime.

It is a super-2 number, since 2×21211110200047² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21211110200447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605555100023 + 10605555100024.

It is an arithmetic number, because the mean of its divisors is an integer number (10605555100024).

Almost surely, 2^{21211110200047} is an apocalyptic number.

21211110200047 is a deficient number, since it is larger than the sum of its proper divisors (1).

21211110200047 is an equidigital number, since it uses as much as digits as its factorization.

21211110200047 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 22.

Adding to 21211110200047 its reverse (74000201111212), we get a palindrome (95211311311259).

The spelling of 21211110200047 in words is "twenty-one trillion, two hundred eleven billion, one hundred ten million, two hundred thousand, forty-seven".