1213321112 has 8 divisors (see below), whose sum is σ = 2274977100. Its totient is φ = 606660552.

The previous prime is 1213321079. The next prime is 1213321147. The reversal of 1213321112 is 2111233121.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75832562 + ... + 75832577.

Almost surely, 2^1213321112 is an apocalyptic number.

It is an amenable number.

1213321112 is a deficient number, since it is larger than the sum of its proper divisors (1061655988).

1213321112 is a wasteful number, since it uses less digits than its factorization.

1213321112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151665145 (or 151665141 counting only the distinct ones).

The product of its digits is 72, while the sum is 17.

The square root of 1213321112 is about 34832.7591786812. The cubic root of 1213321112 is about 1066.5762729822.

Adding to 1213321112 its reverse (2111233121), we get a palindrome (3324554233).

It can be divided in two parts, 121 and 3321112, that added together give a palindrome (3321233).

The spelling of 1213321112 in words is "one billion, two hundred thirteen million, three hundred twenty-one thousand, one hundred twelve".