21061334603 has 2 divisors, whose sum is σ = 21061334604. Its totient is φ = 21061334602.

The previous prime is 21061334599. The next prime is 21061334639. The reversal of 21061334603 is 30643316012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21061334603 - 2² = 21061334599 is a prime.

It is not a weakly prime, because it can be changed into another prime (21061334803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10530667301 + 10530667302.

It is an arithmetic number, because the mean of its divisors is an integer number (10530667302).

Almost surely, 2^21061334603 is an apocalyptic number.

21061334603 is a deficient number, since it is larger than the sum of its proper divisors (1).

21061334603 is an equidigital number, since it uses as much as digits as its factorization.

21061334603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 29.

The spelling of 21061334603 in words is "twenty-one billion, sixty-one million, three hundred thirty-four thousand, six hundred three".