212021321093 has 2 divisors, whose sum is σ = 212021321094. Its totient is φ = 212021321092.

The previous prime is 212021321041. The next prime is 212021321111. The reversal of 212021321093 is 390123120212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210866476804 + 1154844289 = 459202^2 + 33983^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212021321093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212021321693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010660546 + 106010660547.

It is an arithmetic number, because the mean of its divisors is an integer number (106010660547).

Almost surely, 2^212021321093 is an apocalyptic number.

It is an amenable number.

212021321093 is a deficient number, since it is larger than the sum of its proper divisors (1).

212021321093 is an equidigital number, since it uses as much as digits as its factorization.

212021321093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The spelling of 212021321093 in words is "two hundred twelve billion, twenty-one million, three hundred twenty-one thousand, ninety-three".