1213013331 has 24 divisors (see below), whose sum is σ = 1797576144. Its totient is φ = 787760640.

The previous prime is 1213013327. The next prime is 1213013341. The reversal of 1213013331 is 1333103121.

It is a happy number.

It is not a de Polignac number, because 1213013331 - 2² = 1213013327 is a prime.

It is a super-2 number, since 2×1213013331² = 2942802682367431122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1213013341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 288315 + ... + 292491.

It is an arithmetic number, because the mean of its divisors is an integer number (74899006).

Almost surely, 2^1213013331 is an apocalyptic number.

1213013331 is a deficient number, since it is larger than the sum of its proper divisors (584562813).

1213013331 is a wasteful number, since it uses less digits than its factorization.

1213013331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5011 (or 5008 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1213013331 is about 34828.3409165582. The cubic root of 1213013331 is about 1066.4860798559.

Adding to 1213013331 its reverse (1333103121), we get a palindrome (2546116452).

The spelling of 1213013331 in words is "one billion, two hundred thirteen million, thirteen thousand, three hundred thirty-one".