1211133231342 has 16 divisors (see below), whose sum is σ = 2691407180880. Its totient is φ = 403711077096.

The previous prime is 1211133231337. The next prime is 1211133231353. The reversal of 1211133231342 is 2431323311121.

1211133231342 is a `hidden beast` number, since 1 + 2 + 1 + 11 + 332 + 313 + 4 + 2 = 666.

It is a super-2 number, since 2×1211133231342² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11214196533 + ... + 11214196640.

It is an arithmetic number, because the mean of its divisors is an integer number (168212948805).

Almost surely, 2^{1211133231342} is an apocalyptic number.

1211133231342 is an abundant number, since it is smaller than the sum of its proper divisors (1480273949538).

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

1211133231342 is a wasteful number, since it uses less digits than its factorization.

1211133231342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22428393184 (or 22428393178 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

Adding to 1211133231342 its reverse (2431323311121), we get a palindrome (3642456542463).

The spelling of 1211133231342 in words is "one trillion, two hundred eleven billion, one hundred thirty-three million, two hundred thirty-one thousand, three hundred forty-two".