21212002094623 has 2 divisors, whose sum is σ = 21212002094624. Its totient is φ = 21212002094622.

The previous prime is 21212002094611. The next prime is 21212002094711. The reversal of 21212002094623 is 32649020021212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21212002094623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21212002094603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606001047311 + 10606001047312.

It is an arithmetic number, because the mean of its divisors is an integer number (10606001047312).

Almost surely, 2^{21212002094623} is an apocalyptic number.

21212002094623 is a deficient number, since it is larger than the sum of its proper divisors (1).

21212002094623 is an equidigital number, since it uses as much as digits as its factorization.

21212002094623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 34.

The spelling of 21212002094623 in words is "twenty-one trillion, two hundred twelve billion, two million, ninety-four thousand, six hundred twenty-three".