21139097303 has 2 divisors, whose sum is σ = 21139097304. Its totient is φ = 21139097302.

The previous prime is 21139097263. The next prime is 21139097341. The reversal of 21139097303 is 30379093112.

It is an a-pointer prime, because the next prime (21139097341) can be obtained adding 21139097303 to its sum of digits (38).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21139097303 - 2³² = 16844130007 is a prime.

It is a super-2 number, since 2×21139097303² (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 (21139097503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10569548651 + 10569548652.

It is an arithmetic number, because the mean of its divisors is an integer number (10569548652).

Almost surely, 2^21139097303 is an apocalyptic number.

21139097303 is a deficient number, since it is larger than the sum of its proper divisors (1).

21139097303 is an equidigital number, since it uses as much as digits as its factorization.

21139097303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30618, while the sum is 38.

It can be divided in two parts, 2113909 and 7303, that added together give a palindrome (2121212).

The spelling of 21139097303 in words is "twenty-one billion, one hundred thirty-nine million, ninety-seven thousand, three hundred three".