21132230047 has 2 divisors, whose sum is σ = 21132230048. Its totient is φ = 21132230046.

The previous prime is 21132229973. The next prime is 21132230051. The reversal of 21132230047 is 74003223112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21132230047 - 2⁷ = 21132229919 is a prime.

It is a super-2 number, since 2×21132230047² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21132230347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10566115023 + 10566115024.

It is an arithmetic number, because the mean of its divisors is an integer number (10566115024).

Almost surely, 2^21132230047 is an apocalyptic number.

21132230047 is a deficient number, since it is larger than the sum of its proper divisors (1).

21132230047 is an equidigital number, since it uses as much as digits as its factorization.

21132230047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 25.

Adding to 21132230047 its reverse (74003223112), we get a palindrome (95135453159).

The spelling of 21132230047 in words is "twenty-one billion, one hundred thirty-two million, two hundred thirty thousand, forty-seven".