1211320212212 has 24 divisors (see below), whose sum is σ = 2320868877600. Its totient is φ = 548612364960.

The previous prime is 1211320212173. The next prime is 1211320212233. The reversal of 1211320212212 is 2122120231121.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 49680962 + ... + 49705337.

It is an arithmetic number, because the mean of its divisors is an integer number (96702869900).

Almost surely, 2^{1211320212212} is an apocalyptic number.

It is an amenable number.

1211320212212 is a deficient number, since it is larger than the sum of its proper divisors (1109548665388).

1211320212212 is a wasteful number, since it uses less digits than its factorization.

1211320212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99386591 (or 99386589 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 1211320212212 its reverse (2122120231121), we get a palindrome (3333440443333).

The spelling of 1211320212212 in words is "one trillion, two hundred eleven billion, three hundred twenty million, two hundred twelve thousand, two hundred twelve".