212435662321 has 2 divisors, whose sum is σ = 212435662322. Its totient is φ = 212435662320.

The previous prime is 212435662303. The next prime is 212435662399. The reversal of 212435662321 is 123266534212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209362068721 + 3073593600 = 457561^2 + 55440^2 .

It is a cyclic number.

It is not a de Polignac number, because 212435662321 - 2¹³ = 212435654129 is a prime.

It is not a weakly prime, because it can be changed into another prime (212435662121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106217831160 + 106217831161.

It is an arithmetic number, because the mean of its divisors is an integer number (106217831161).

Almost surely, 2^212435662321 is an apocalyptic number.

It is an amenable number.

212435662321 is a deficient number, since it is larger than the sum of its proper divisors (1).

212435662321 is an equidigital number, since it uses as much as digits as its factorization.

212435662321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 37.

The spelling of 212435662321 in words is "two hundred twelve billion, four hundred thirty-five million, six hundred sixty-two thousand, three hundred twenty-one".