21113013037 has 2 divisors, whose sum is σ = 21113013038. Its totient is φ = 21113013036.

The previous prime is 21113013013. The next prime is 21113013059. The reversal of 21113013037 is 73031031112.

It is an a-pointer prime, because the next prime (21113013059) can be obtained adding 21113013037 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18111507241 + 3001505796 = 134579^2 + 54786^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21113013037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21113012999 and 21113013017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21113013137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556506518 + 10556506519.

It is an arithmetic number, because the mean of its divisors is an integer number (10556506519).

Almost surely, 2^21113013037 is an apocalyptic number.

It is an amenable number.

21113013037 is a deficient number, since it is larger than the sum of its proper divisors (1).

21113013037 is an equidigital number, since it uses as much as digits as its factorization.

21113013037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378, while the sum is 22.

Adding to 21113013037 its reverse (73031031112), we get a palindrome (94144044149).

The spelling of 21113013037 in words is "twenty-one billion, one hundred thirteen million, thirteen thousand, thirty-seven".