21274111263 has 8 divisors (see below), whose sum is σ = 28846252800. Its totient is φ = 13942355288.

The previous prime is 21274111259. The next prime is 21274111301. The reversal of 21274111263 is 36211147212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21274111263 - 2² = 21274111259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21274111263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21274111163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60096183 + ... + 60096536.

It is an arithmetic number, because the mean of its divisors is an integer number (3605781600).

Almost surely, 2^21274111263 is an apocalyptic number.

21274111263 is a deficient number, since it is larger than the sum of its proper divisors (7572141537).

21274111263 is a wasteful number, since it uses less digits than its factorization.

21274111263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120192781.

The product of its digits is 4032, while the sum is 30.

Adding to 21274111263 its reverse (36211147212), we get a palindrome (57485258475).

The spelling of 21274111263 in words is "twenty-one billion, two hundred seventy-four million, one hundred eleven thousand, two hundred sixty-three".