1213404111 has 16 divisors (see below), whose sum is σ = 1808670720. Its totient is φ = 803970360.

The previous prime is 1213404107. The next prime is 1213404113. The reversal of 1213404111 is 1114043121.

1213404111 is a `hidden beast` number, since 1 + 213 + 40 + 411 + 1 = 666.

It is not a de Polignac number, because 1213404111 - 2² = 1213404107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213404113) 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, 133455 + ... + 142256.

It is an arithmetic number, because the mean of its divisors is an integer number (113041920).

Almost surely, 2^1213404111 is an apocalyptic number.

1213404111 is a deficient number, since it is larger than the sum of its proper divisors (595266609).

1213404111 is a wasteful number, since it uses less digits than its factorization.

1213404111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275883 (or 275877 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 1213404111 is about 34833.9505511505. The cubic root of 1213404111 is about 1066.6005926628.

Adding to 1213404111 its reverse (1114043121), we get a palindrome (2327447232).

The spelling of 1213404111 in words is "one billion, two hundred thirteen million, four hundred four thousand, one hundred eleven".