212010021539 has 2 divisors, whose sum is σ = 212010021540. Its totient is φ = 212010021538.

The previous prime is 212010021533. The next prime is 212010021569. The reversal of 212010021539 is 935120010212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212010021539 - 2⁸ = 212010021283 is a prime.

It is not a weakly prime, because it can be changed into another prime (212010021533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106005010769 + 106005010770.

It is an arithmetic number, because the mean of its divisors is an integer number (106005010770).

Almost surely, 2^212010021539 is an apocalyptic number.

212010021539 is a deficient number, since it is larger than the sum of its proper divisors (1).

212010021539 is an equidigital number, since it uses as much as digits as its factorization.

212010021539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 26.

The spelling of 212010021539 in words is "two hundred twelve billion, ten million, twenty-one thousand, five hundred thirty-nine".