1213020244 has 12 divisors (see below), whose sum is σ = 2247655284. Its totient is φ = 570833024.

The previous prime is 1213020241. The next prime is 1213020251. The reversal of 1213020244 is 4420203121.

It can be written as a sum of positive squares in 2 ways, for example, as 974688400 + 238331844 = 31220^2 + 15438^2 .

It is a super-2 number, since 2×1213020244² = 2942836224707639072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213020241) 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, 8919199 + ... + 8919334.

It is an arithmetic number, because the mean of its divisors is an integer number (187304607).

Almost surely, 2^1213020244 is an apocalyptic number.

It is an amenable number.

1213020244 is a deficient number, since it is larger than the sum of its proper divisors (1034635040).

1213020244 is a wasteful number, since it uses less digits than its factorization.

1213020244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17838554 (or 17838552 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1213020244 is about 34828.4401603058. The cubic root of 1213020244 is about 1066.4881058309.

Adding to 1213020244 its reverse (4420203121), we get a palindrome (5633223365).

The spelling of 1213020244 in words is "one billion, two hundred thirteen million, twenty thousand, two hundred forty-four".