1230021144 has 144 divisors (see below), whose sum is σ = 3725303400. Its totient is φ = 366263040.

The previous prime is 1230021119. The next prime is 1230021151. The reversal of 1230021144 is 4411200321.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 512812 + ... + 515204.

Almost surely, 2^1230021144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1230021144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1862651700).

1230021144 is an abundant number, since it is smaller than the sum of its proper divisors (2495282256).

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

1230021144 is a wasteful number, since it uses less digits than its factorization.

1230021144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2486 (or 2468 counting only the distinct ones).

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

The square root of 1230021144 is about 35071.6572747853. The cubic root of 1230021144 is about 1071.4474091012.

Adding to 1230021144 its reverse (4411200321), we get a palindrome (5641221465).

The spelling of 1230021144 in words is "one billion, two hundred thirty million, twenty-one thousand, one hundred forty-four".