1213122544 has 10 divisors (see below), whose sum is σ = 2350424960. Its totient is φ = 606561264.

The previous prime is 1213122539. The next prime is 1213122553. The reversal of 1213122544 is 4452213121.

It is a super-2 number, since 2×1213122544² = 2943332613522063872, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37910064 + ... + 37910095.

It is an arithmetic number, because the mean of its divisors is an integer number (235042496).

Almost surely, 2^1213122544 is an apocalyptic number.

It is an amenable number.

1213122544 is a deficient number, since it is larger than the sum of its proper divisors (1137302416).

1213122544 is an equidigital number, since it uses as much as digits as its factorization.

1213122544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75820167 (or 75820161 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 1213122544 is about 34829.9087566993. The cubic root of 1213122544 is about 1066.5180857280.

Adding to 1213122544 its reverse (4452213121), we get a palindrome (5665335665).

The spelling of 1213122544 in words is "one billion, two hundred thirteen million, one hundred twenty-two thousand, five hundred forty-four".