1213112104 has 8 divisors (see below), whose sum is σ = 2274585210. Its totient is φ = 606556048.

The previous prime is 1213112083. The next prime is 1213112113. The reversal of 1213112104 is 4012113121.

It can be written as a sum of positive squares in only one way, i.e., 1102904100 + 110208004 = 33210^2 + 10498^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75819499 + ... + 75819514.

Almost surely, 2^1213112104 is an apocalyptic number.

It is an amenable number.

1213112104 is a deficient number, since it is larger than the sum of its proper divisors (1061473106).

1213112104 is a wasteful number, since it uses less digits than its factorization.

1213112104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151639019 (or 151639015 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1213112104 is about 34829.7588851832. The cubic root of 1213112104 is about 1066.5150262732.

Adding to 1213112104 its reverse (4012113121), we get a palindrome (5225225225).

The spelling of 1213112104 in words is "one billion, two hundred thirteen million, one hundred twelve thousand, one hundred four".