20121303263 has 2 divisors, whose sum is σ = 20121303264. Its totient is φ = 20121303262.

The previous prime is 20121303197. The next prime is 20121303271. The reversal of 20121303263 is 36230312102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20121303263 - 2¹² = 20121299167 is a prime.

It is a super-2 number, since 2×20121303263² (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 (20121303283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060651631 + 10060651632.

It is an arithmetic number, because the mean of its divisors is an integer number (10060651632).

Almost surely, 2^20121303263 is an apocalyptic number.

20121303263 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121303263 is an equidigital number, since it uses as much as digits as its factorization.

20121303263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 20121303263 its reverse (36230312102), we get a palindrome (56351615365).

The spelling of 20121303263 in words is "twenty billion, one hundred twenty-one million, three hundred three thousand, two hundred sixty-three".