21212011102103 has 2 divisors, whose sum is σ = 21212011102104. Its totient is φ = 21212011102102.

The previous prime is 21212011102091. The next prime is 21212011102111. The reversal of 21212011102103 is 30120111021212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21212011102103 - 2²⁴ = 21211994324887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21212011102123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606005551051 + 10606005551052.

It is an arithmetic number, because the mean of its divisors is an integer number (10606005551052).

Almost surely, 2^{21212011102103} is an apocalyptic number.

21212011102103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21212011102103 is an equidigital number, since it uses as much as digits as its factorization.

21212011102103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 21212011102103 its reverse (30120111021212), we get a palindrome (51332122123315).

The spelling of 21212011102103 in words is "twenty-one trillion, two hundred twelve billion, eleven million, one hundred two thousand, one hundred three".