21360060031 has 2 divisors, whose sum is σ = 21360060032. Its totient is φ = 21360060030.

The previous prime is 21360059971. The next prime is 21360060037. The reversal of 21360060031 is 13006006312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21360060031 - 2⁹ = 21360059519 is a prime.

It is a super-2 number, since 2×21360060031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21360059984 and 21360060011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21360060037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10680030015 + 10680030016.

It is an arithmetic number, because the mean of its divisors is an integer number (10680030016).

Almost surely, 2^21360060031 is an apocalyptic number.

21360060031 is a deficient number, since it is larger than the sum of its proper divisors (1).

21360060031 is an equidigital number, since it uses as much as digits as its factorization.

21360060031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21360060031 its reverse (13006006312), we get a palindrome (34366066343).

The spelling of 21360060031 in words is "twenty-one billion, three hundred sixty million, sixty thousand, thirty-one".