212030112391 has 2 divisors, whose sum is σ = 212030112392. Its totient is φ = 212030112390.

The previous prime is 212030112377. The next prime is 212030112479. The reversal of 212030112391 is 193211030212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212030112391 is a prime.

It is a super-4 number, since 4×212030112391⁴ (a number of 46 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212030112311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106015056195 + 106015056196.

It is an arithmetic number, because the mean of its divisors is an integer number (106015056196).

Almost surely, 2^212030112391 is an apocalyptic number.

212030112391 is a deficient number, since it is larger than the sum of its proper divisors (1).

212030112391 is an equidigital number, since it uses as much as digits as its factorization.

212030112391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The spelling of 212030112391 in words is "two hundred twelve billion, thirty million, one hundred twelve thousand, three hundred ninety-one".