21212011021259 has 2 divisors, whose sum is σ = 21212011021260. Its totient is φ = 21212011021258.

The previous prime is 21212011021099. The next prime is 21212011021277. The reversal of 21212011021259 is 95212011021212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21212011021259 - 2²⁰ = 21212009972683 is a prime.

It is not a weakly prime, because it can be changed into another prime (21212011041259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606005510629 + 10606005510630.

It is an arithmetic number, because the mean of its divisors is an integer number (10606005510630).

Almost surely, 2^{21212011021259} is an apocalyptic number.

21212011021259 is a deficient number, since it is larger than the sum of its proper divisors (1).

21212011021259 is an equidigital number, since it uses as much as digits as its factorization.

21212011021259 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 29.

The spelling of 21212011021259 in words is "twenty-one trillion, two hundred twelve billion, eleven million, twenty-one thousand, two hundred fifty-nine".