212211242805 has 16 divisors (see below), whose sum is σ = 339587241984. Its totient is φ = 113162911680.

The previous prime is 212211242773. The next prime is 212211242809. The reversal of 212211242805 is 508242112212.

212211242805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212211242805 - 2⁵ = 212211242773 is a prime.

It is a super-2 number, since 2×212211242805² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212211242809) 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 in 15 ways as a sum of consecutive naturals, for example, 918901 + ... + 1126410.

It is an arithmetic number, because the mean of its divisors is an integer number (21224202624).

Almost surely, 2^212211242805 is an apocalyptic number.

It is an amenable number.

212211242805 is a deficient number, since it is larger than the sum of its proper divisors (127375999179).

212211242805 is a wasteful number, since it uses less digits than its factorization.

212211242805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2052236.

The product of its (nonzero) digits is 5120, while the sum is 30.

The spelling of 212211242805 in words is "two hundred twelve billion, two hundred eleven million, two hundred forty-two thousand, eight hundred five".