212001982261 has 2 divisors, whose sum is σ = 212001982262. Its totient is φ = 212001982260.

The previous prime is 212001982223. The next prime is 212001982267. The reversal of 212001982261 is 162289100212.

212001982261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127756919761 + 84245062500 = 357431^2 + 290250^2 .

It is a cyclic number.

It is not a de Polignac number, because 212001982261 - 2²⁷ = 211867764533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212001982267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106000991130 + 106000991131.

It is an arithmetic number, because the mean of its divisors is an integer number (106000991131).

Almost surely, 2^212001982261 is an apocalyptic number.

It is an amenable number.

212001982261 is a deficient number, since it is larger than the sum of its proper divisors (1).

212001982261 is an equidigital number, since it uses as much as digits as its factorization.

212001982261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 34.

The spelling of 212001982261 in words is "two hundred twelve billion, one million, nine hundred eighty-two thousand, two hundred sixty-one".