21030103069 has 2 divisors, whose sum is σ = 21030103070. Its totient is φ = 21030103068.

The previous prime is 21030103037. The next prime is 21030103097. The reversal of 21030103069 is 96030103012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16431906969 + 4598196100 = 128187^2 + 67810^2 .

It is a cyclic number.

It is not a de Polignac number, because 21030103069 - 2⁵ = 21030103037 is a prime.

It is a super-2 number, since 2×21030103069² (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 (21030103169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10515051534 + 10515051535.

It is an arithmetic number, because the mean of its divisors is an integer number (10515051535).

Almost surely, 2^21030103069 is an apocalyptic number.

It is an amenable number.

21030103069 is a deficient number, since it is larger than the sum of its proper divisors (1).

21030103069 is an equidigital number, since it uses as much as digits as its factorization.

21030103069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 25.

The spelling of 21030103069 in words is "twenty-one billion, thirty million, one hundred three thousand, sixty-nine".