1213131192 has 128 divisors (see below), whose sum is σ = 3749276160. Its totient is φ = 318528000.

The previous prime is 1213131167. The next prime is 1213131197. The reversal of 1213131192 is 2911313121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213131197) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 547078 + ... + 549290.

It is an arithmetic number, because the mean of its divisors is an integer number (29291220).

Almost surely, 2^1213131192 is an apocalyptic number.

1213131192 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 1213131192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1874638080).

1213131192 is an abundant number, since it is smaller than the sum of its proper divisors (2536144968).

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

1213131192 is a wasteful number, since it uses less digits than its factorization.

1213131192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2493 (or 2489 counting only the distinct ones).

The product of its digits is 324, while the sum is 24.

The square root of 1213131192 is about 34830.0329026546. The cubic root of 1213131192 is about 1066.5206200218.

It can be divided in two parts, 121313119 and 2, that added together give a palindrome (121313121).

The spelling of 1213131192 in words is "one billion, two hundred thirteen million, one hundred thirty-one thousand, one hundred ninety-two".