1213403112 has 64 divisors (see below), whose sum is σ = 3402129600. Its totient is φ = 400680000.

The previous prime is 1213403063. The next prime is 1213403173. The reversal of 1213403112 is 2113043121.

1213403112 is a `hidden beast` number, since 12 + 1 + 340 + 311 + 2 = 666.

It is a super-2 number, since 2×1213403112² = 2944694224422569088, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3139 + ... + 49362.

It is an arithmetic number, because the mean of its divisors is an integer number (53158275).

Almost surely, 2^1213403112 is an apocalyptic number.

1213403112 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 1213403112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1701064800).

1213403112 is an abundant number, since it is smaller than the sum of its proper divisors (2188726488).

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

1213403112 is a wasteful number, since it uses less digits than its factorization.

1213403112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52623 (or 52613 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1213403112 is about 34833.9362116887. The cubic root of 1213403112 is about 1066.6002999507.

Adding to 1213403112 its reverse (2113043121), we get a palindrome (3326446233).

The spelling of 1213403112 in words is "one billion, two hundred thirteen million, four hundred three thousand, one hundred twelve".