1212140244 has 144 divisors (see below), whose sum is σ = 3397718016. Its totient is φ = 335160000.

The previous prime is 1212140219. The next prime is 1212140257. The reversal of 1212140244 is 4420412121.

It is a super-2 number, since 2×1212140244² = 2938567942248759072, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1212140244.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4829119 + ... + 4829369.

It is an arithmetic number, because the mean of its divisors is an integer number (23595264).

Almost surely, 2^1212140244 is an apocalyptic number.

1212140244 is a gapful number since it is divisible by the number (14) 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 1212140244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1698859008).

1212140244 is an abundant number, since it is smaller than the sum of its proper divisors (2185577772).

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

1212140244 is a wasteful number, since it uses less digits than its factorization.

1212140244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506 (or 497 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 1212140244 is about 34815.8045146166. The cubic root of 1212140244 is about 1066.2301446028.

Adding to 1212140244 its reverse (4420412121), we get a palindrome (5632552365).

The spelling of 1212140244 in words is "one billion, two hundred twelve million, one hundred forty thousand, two hundred forty-four".