212001211205 has 24 divisors (see below), whose sum is σ = 298814923008. Its totient is φ = 141443247168.

The previous prime is 212001211189. The next prime is 212001211207. The reversal of 212001211205 is 502112100212.

It is not a de Polignac number, because 212001211205 - 2⁴ = 212001211189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212001211207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2164349 + ... + 2260178.

It is an arithmetic number, because the mean of its divisors is an integer number (12450621792).

Almost surely, 2^212001211205 is an apocalyptic number.

It is an amenable number.

212001211205 is a deficient number, since it is larger than the sum of its proper divisors (86813711803).

212001211205 is an equidigital number, since it uses as much as digits as its factorization.

212001211205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4424613 (or 4424576 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 212001211205 its reverse (502112100212), we get a palindrome (714113311417).

The spelling of 212001211205 in words is "two hundred twelve billion, one million, two hundred eleven thousand, two hundred five".