21272304203 has 2 divisors, whose sum is σ = 21272304204. Its totient is φ = 21272304202.

The previous prime is 21272304169. The next prime is 21272304241. The reversal of 21272304203 is 30240327212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21272304203 - 2²⁶ = 21205195339 is a prime.

It is a super-2 number, since 2×21272304203² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21272354203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10636152101 + 10636152102.

It is an arithmetic number, because the mean of its divisors is an integer number (10636152102).

Almost surely, 2^21272304203 is an apocalyptic number.

21272304203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21272304203 is an equidigital number, since it uses as much as digits as its factorization.

21272304203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 26.

The spelling of 21272304203 in words is "twenty-one billion, two hundred seventy-two million, three hundred four thousand, two hundred three".