212211121209 has 16 divisors (see below), whose sum is σ = 292162596864. Its totient is φ = 136869584400.

The previous prime is 212211121153. The next prime is 212211121211. The reversal of 212211121209 is 902121112212.

It is not a de Polignac number, because 212211121209 - 2⁹ = 212211120697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212211121219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24949 + ... + 651954.

It is an arithmetic number, because the mean of its divisors is an integer number (18260162304).

Almost surely, 2^212211121209 is an apocalyptic number.

It is an amenable number.

212211121209 is a deficient number, since it is larger than the sum of its proper divisors (79951475655).

212211121209 is a wasteful number, since it uses less digits than its factorization.

212211121209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680308.

The product of its (nonzero) digits is 288, while the sum is 24.

The spelling of 212211121209 in words is "two hundred twelve billion, two hundred eleven million, one hundred twenty-one thousand, two hundred nine".