1213020224 has 28 divisors (see below), whose sum is σ = 2592249324. Its totient is φ = 559855104.

The previous prime is 1213020217. The next prime is 1213020241. The reversal of 1213020224 is 4220203121.

It can be written as a sum of positive squares in 2 ways, for example, as 326886400 + 886133824 = 18080^2 + 29768^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 728147 + ... + 729810.

It is an arithmetic number, because the mean of its divisors is an integer number (92580333).

Almost surely, 2^1213020224 is an apocalyptic number.

It is an amenable number.

1213020224 is an abundant number, since it is smaller than the sum of its proper divisors (1379229100).

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

1213020224 is a wasteful number, since it uses less digits than its factorization.

1213020224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1457982 (or 1457972 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1213020224 is about 34828.4398731841. The cubic root of 1213020224 is about 1066.4880999696.

Adding to 1213020224 its reverse (4220203121), we get a palindrome (5433223345).

The spelling of 1213020224 in words is "one billion, two hundred thirteen million, twenty thousand, two hundred twenty-four".