1213022412 has 96 divisors (see below), whose sum is σ = 3603031040. Its totient is φ = 345720960.

The previous prime is 1213022407. The next prime is 1213022429. The reversal of 1213022412 is 2142203121.

It is a happy number.

1213022412 is a `hidden beast` number, since 121 + 302 + 241 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 343737 + ... + 347247.

Almost surely, 2^1213022412 is an apocalyptic number.

1213022412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213022412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1801515520).

1213022412 is an abundant number, since it is smaller than the sum of its proper divisors (2390008628).

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

1213022412 is a wasteful number, since it uses less digits than its factorization.

1213022412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3988 (or 3980 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1213022412 is about 34828.4712842812. The cubic root of 1213022412 is about 1066.4887411995.

Adding to 1213022412 its reverse (2142203121), we get a palindrome (3355225533).

The spelling of 1213022412 in words is "one billion, two hundred thirteen million, twenty-two thousand, four hundred twelve".