1211331031112 has 32 divisors (see below), whose sum is σ = 2482424133120. Its totient is φ = 551649803520.

The previous prime is 1211331031111. The next prime is 1211331031117. The reversal of 1211331031112 is 2111301331121.

It is a super-2 number, since 2×1211331031112² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1211331031111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143654588 + ... + 143663019.

It is an arithmetic number, because the mean of its divisors is an integer number (77575754160).

Almost surely, 2^{1211331031112} is an apocalyptic number.

It is an amenable number.

1211331031112 is an abundant number, since it is smaller than the sum of its proper divisors (1271093102008).

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

1211331031112 is a wasteful number, since it uses less digits than its factorization.

1211331031112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287317661 (or 287317657 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 1211331031112 its reverse (2111301331121), we get a palindrome (3322632362233).

The spelling of 1211331031112 in words is "one trillion, two hundred eleven billion, three hundred thirty-one million, thirty-one thousand, one hundred twelve".