212210209973 has 2 divisors, whose sum is σ = 212210209974. Its totient is φ = 212210209972.

The previous prime is 212210209951. The next prime is 212210210011. The reversal of 212210209973 is 379902012212.

It is an a-pointer prime, because the next prime (212210210011) can be obtained adding 212210209973 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149410852369 + 62799357604 = 386537^2 + 250598^2 .

It is a cyclic number.

It is not a de Polignac number, because 212210209973 - 2¹⁴ = 212210193589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212210209943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106105104986 + 106105104987.

It is an arithmetic number, because the mean of its divisors is an integer number (106105104987).

Almost surely, 2^212210209973 is an apocalyptic number.

It is an amenable number.

212210209973 is a deficient number, since it is larger than the sum of its proper divisors (1).

212210209973 is an equidigital number, since it uses as much as digits as its factorization.

212210209973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 38.

The spelling of 212210209973 in words is "two hundred twelve billion, two hundred ten million, two hundred nine thousand, nine hundred seventy-three".