1213022144 has 28 divisors (see below), whose sum is σ = 2416073400. Its totient is φ = 604247808.

The previous prime is 1213022143. The next prime is 1213022147. The reversal of 1213022144 is 4412203121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213022143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18014 + ... + 52445.

Almost surely, 2^1213022144 is an apocalyptic number.

It is an amenable number.

1213022144 is a deficient number, since it is larger than the sum of its proper divisors (1203051256).

1213022144 is an equidigital number, since it uses as much as digits as its factorization.

1213022144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70740 (or 70730 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1213022144 is about 34828.4674368540. The cubic root of 1213022144 is about 1066.4886626577.

Adding to 1213022144 its reverse (4412203121), we get a palindrome (5625225265).

The spelling of 1213022144 in words is "one billion, two hundred thirteen million, twenty-two thousand, one hundred forty-four".