212621254771 has 2 divisors, whose sum is σ = 212621254772. Its totient is φ = 212621254770.

The previous prime is 212621254757. The next prime is 212621254787. The reversal of 212621254771 is 177452126212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212621254771 - 2²³ = 212612866163 is a prime.

It is not a weakly prime, because it can be changed into another prime (212621254271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106310627385 + 106310627386.

It is an arithmetic number, because the mean of its divisors is an integer number (106310627386).

Almost surely, 2^212621254771 is an apocalyptic number.

212621254771 is a deficient number, since it is larger than the sum of its proper divisors (1).

212621254771 is an equidigital number, since it uses as much as digits as its factorization.

212621254771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94080, while the sum is 40.

The spelling of 212621254771 in words is "two hundred twelve billion, six hundred twenty-one million, two hundred fifty-four thousand, seven hundred seventy-one".