212059222981 has 4 divisors (see below), whose sum is σ = 212847547500. Its totient is φ = 211270898464.

The previous prime is 212059222871. The next prime is 212059223027. The reversal of 212059222981 is 189222950212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46091796100 + 165967426881 = 214690^2 + 407391^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212059222981 is a prime.

It is a super-2 number, since 2×212059222981² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212059292981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 394161856 + ... + 394162393.

It is an arithmetic number, because the mean of its divisors is an integer number (53211886875).

Almost surely, 2^212059222981 is an apocalyptic number.

It is an amenable number.

212059222981 is a deficient number, since it is larger than the sum of its proper divisors (788324519).

212059222981 is an equidigital number, since it uses as much as digits as its factorization.

212059222981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788324518.

The product of its (nonzero) digits is 103680, while the sum is 43.

The spelling of 212059222981 in words is "two hundred twelve billion, fifty-nine million, two hundred twenty-two thousand, nine hundred eighty-one".