1313220111 has 16 divisors (see below), whose sum is σ = 2016377088. Its totient is φ = 744681600.

The previous prime is 1313220089. The next prime is 1313220113. The reversal of 1313220111 is 1110223131.

It is a happy number.

It is not a de Polignac number, because 1313220111 - 2²² = 1309025807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313220113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 235930 + ... + 241431.

It is an arithmetic number, because the mean of its divisors is an integer number (126023568).

Almost surely, 2^1313220111 is an apocalyptic number.

1313220111 is a deficient number, since it is larger than the sum of its proper divisors (703156977).

1313220111 is a wasteful number, since it uses less digits than its factorization.

1313220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477502.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1313220111 is about 36238.3789786464. The cubic root of 1313220111 is about 1095.0799858171.

Adding to 1313220111 its reverse (1110223131), we get a palindrome (2423443242).

The spelling of 1313220111 in words is "one billion, three hundred thirteen million, two hundred twenty thousand, one hundred eleven".