21212067902273 has 2 divisors, whose sum is σ = 21212067902274. Its totient is φ = 21212067902272.

The previous prime is 21212067902269. The next prime is 21212067902351. The reversal of 21212067902273 is 37220976021212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12829699568449 + 8382368333824 = 3581857^2 + 2895232^2 .

It is a cyclic number.

It is not a de Polignac number, because 21212067902273 - 2² = 21212067902269 is a prime.

It is not a weakly prime, because it can be changed into another prime (21212067902213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606033951136 + 10606033951137.

It is an arithmetic number, because the mean of its divisors is an integer number (10606033951137).

Almost surely, 2^{21212067902273} is an apocalyptic number.

It is an amenable number.

21212067902273 is a deficient number, since it is larger than the sum of its proper divisors (1).

21212067902273 is an equidigital number, since it uses as much as digits as its factorization.

21212067902273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 44.

The spelling of 21212067902273 in words is "twenty-one trillion, two hundred twelve billion, sixty-seven million, nine hundred two thousand, two hundred seventy-three".