1211131220322 has 32 divisors (see below), whose sum is σ = 2550418153920. Its totient is φ = 382362258240.

The previous prime is 1211131220317. The next prime is 1211131220353. The reversal of 1211131220322 is 2230221311121.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 954613 + ... + 1825800.

It is an arithmetic number, because the mean of its divisors is an integer number (79700567310).

Almost surely, 2^{1211131220322} is an apocalyptic number.

1211131220322 is an abundant number, since it is smaller than the sum of its proper divisors (1339286933598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211131220322 is a wasteful number, since it uses less digits than its factorization.

1211131220322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2784258.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 1211131220322 its reverse (2230221311121), we get a palindrome (3441352531443).

The spelling of 1211131220322 in words is "one trillion, two hundred eleven billion, one hundred thirty-one million, two hundred twenty thousand, three hundred twenty-two".