21033110027 has 2 divisors, whose sum is σ = 21033110028. Its totient is φ = 21033110026.

The previous prime is 21033110023. The next prime is 21033110057. The reversal of 21033110027 is 72001133012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21033110027 - 2² = 21033110023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21033109990 and 21033110008.

It is not a weakly prime, because it can be changed into another prime (21033110023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10516555013 + 10516555014.

It is an arithmetic number, because the mean of its divisors is an integer number (10516555014).

Almost surely, 2^21033110027 is an apocalyptic number.

21033110027 is a deficient number, since it is larger than the sum of its proper divisors (1).

21033110027 is an equidigital number, since it uses as much as digits as its factorization.

21033110027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 20.

Adding to 21033110027 its reverse (72001133012), we get a palindrome (93034243039).

The spelling of 21033110027 in words is "twenty-one billion, thirty-three million, one hundred ten thousand, twenty-seven".