212042140393 has 2 divisors, whose sum is σ = 212042140394. Its totient is φ = 212042140392.

The previous prime is 212042140379. The next prime is 212042140439. The reversal of 212042140393 is 393041240212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177487791849 + 34554348544 = 421293^2 + 185888^2 .

It is a cyclic number.

It is not a de Polignac number, because 212042140393 - 2¹³ = 212042132201 is a prime.

It is not a weakly prime, because it can be changed into another prime (212042140693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106021070196 + 106021070197.

It is an arithmetic number, because the mean of its divisors is an integer number (106021070197).

Almost surely, 2^212042140393 is an apocalyptic number.

It is an amenable number.

212042140393 is a deficient number, since it is larger than the sum of its proper divisors (1).

212042140393 is an equidigital number, since it uses as much as digits as its factorization.

212042140393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 31.

The spelling of 212042140393 in words is "two hundred twelve billion, forty-two million, one hundred forty thousand, three hundred ninety-three".