1201111323212 has 24 divisors (see below), whose sum is σ = 2206789783296. Its totient is φ = 570920339088.

The previous prime is 1201111323211. The next prime is 1201111323259. The reversal of 1201111323212 is 2123231111021.

It is not an unprimeable number, because it can be changed into a prime (1201111323211) by changing a digit.

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, 40032728 + ... + 40062719.

It is an arithmetic number, because the mean of its divisors is an integer number (91949574304).

Almost surely, 2^{1201111323212} is an apocalyptic number.

It is an amenable number.

1201111323212 is a deficient number, since it is larger than the sum of its proper divisors (1005678460084).

1201111323212 is a wasteful number, since it uses less digits than its factorization.

1201111323212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80095637 (or 80095635 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1201111323212 its reverse (2123231111021), we get a palindrome (3324342434233).

The spelling of 1201111323212 in words is "one trillion, two hundred one billion, one hundred eleven million, three hundred twenty-three thousand, two hundred twelve".