212110191811493 has 2 divisors, whose sum is σ = 212110191811494. Its totient is φ = 212110191811492.

The previous prime is 212110191811477. The next prime is 212110191811589. The reversal of 212110191811493 is 394118191011212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133327135347169 + 78783056464324 = 11546737^2 + 8875982^2 .

It is a cyclic number.

It is not a de Polignac number, because 212110191811493 - 2⁴ = 212110191811477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212110191211493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106055095905746 + 106055095905747.

It is an arithmetic number, because the mean of its divisors is an integer number (106055095905747).

Almost surely, 2^{212110191811493} is an apocalyptic number.

It is an amenable number.

212110191811493 is a deficient number, since it is larger than the sum of its proper divisors (1).

212110191811493 is an equidigital number, since it uses as much as digits as its factorization.

212110191811493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 44.

The spelling of 212110191811493 in words is "two hundred twelve trillion, one hundred ten billion, one hundred ninety-one million, eight hundred eleven thousand, four hundred ninety-three".