1213111132 has 6 divisors (see below), whose sum is σ = 2122944488. Its totient is φ = 606555564.

The previous prime is 1213111121. The next prime is 1213111139. The reversal of 1213111132 is 2311113121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213111139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151638888 + ... + 151638895.

Almost surely, 2^1213111132 is an apocalyptic number.

It is an amenable number.

1213111132 is a deficient number, since it is larger than the sum of its proper divisors (909833356).

1213111132 is a wasteful number, since it uses less digits than its factorization.

1213111132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303277787 (or 303277785 counting only the distinct ones).

The product of its digits is 36, while the sum is 16.

The square root of 1213111132 is about 34829.7449315955. The cubic root of 1213111132 is about 1066.5147414266.

Adding to 1213111132 its reverse (2311113121), we get a palindrome (3524224253).

The spelling of 1213111132 in words is "one billion, two hundred thirteen million, one hundred eleven thousand, one hundred thirty-two".