1313121212224 has 14 divisors (see below), whose sum is σ = 2605724905634. Its totient is φ = 656560606080.

The previous prime is 1313121212177. The next prime is 1313121212239. The reversal of 1313121212224 is 4222121213131.

It can be written as a sum of positive squares in only one way, i.e., 1165536160000 + 147585052224 = 1079600^2 + 384168^2 .

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, 10258759407 + ... + 10258759534.

Almost surely, 2^{1313121212224} is an apocalyptic number.

It is an amenable number.

1313121212224 is a deficient number, since it is larger than the sum of its proper divisors (1292603693410).

1313121212224 is an equidigital number, since it uses as much as digits as its factorization.

1313121212224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20517518953 (or 20517518943 counting only the distinct ones).

The product of its digits is 1152, while the sum is 25.

Adding to 1313121212224 its reverse (4222121213131), we get a palindrome (5535242425355).

The spelling of 1313121212224 in words is "one trillion, three hundred thirteen billion, one hundred twenty-one million, two hundred twelve thousand, two hundred twenty-four".