1212211012209 has 32 divisors (see below), whose sum is σ = 1709437255680. Its totient is φ = 762851779200.

The previous prime is 1212211012183. The next prime is 1212211012219. The reversal of 1212211012209 is 9022101122121.

It is not a de Polignac number, because 1212211012209 - 2¹¹ = 1212211010161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212211012219) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22191072 + ... + 22245630.

It is an arithmetic number, because the mean of its divisors is an integer number (53419914240).

Almost surely, 2^{1212211012209} is an apocalyptic number.

It is an amenable number.

1212211012209 is a deficient number, since it is larger than the sum of its proper divisors (497226243471).

1212211012209 is a wasteful number, since it uses less digits than its factorization.

1212211012209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60461.

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

The spelling of 1212211012209 in words is "one trillion, two hundred twelve billion, two hundred eleven million, twelve thousand, two hundred nine".