21212202112039 has 2 divisors, whose sum is σ = 21212202112040. Its totient is φ = 21212202112038.

The previous prime is 21212202112021. The next prime is 21212202112117. The reversal of 21212202112039 is 93021120221212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21212202112039 - 2⁷ = 21212202111911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21212202111998 and 21212202112016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21212202122039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606101056019 + 10606101056020.

It is an arithmetic number, because the mean of its divisors is an integer number (10606101056020).

Almost surely, 2^{21212202112039} is an apocalyptic number.

21212202112039 is a deficient number, since it is larger than the sum of its proper divisors (1).

21212202112039 is an equidigital number, since it uses as much as digits as its factorization.

21212202112039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The spelling of 21212202112039 in words is "twenty-one trillion, two hundred twelve billion, two hundred two million, one hundred twelve thousand, thirty-nine".