1121611413 has 16 divisors (see below), whose sum is σ = 1611229760. Its totient is φ = 689917824.

The previous prime is 1121611411. The next prime is 1121611459. The reversal of 1121611413 is 3141161211.

It is not a de Polignac number, because 1121611413 - 2¹ = 1121611411 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1121611413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121611411) 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, 110298 + ... + 120036.

It is an arithmetic number, because the mean of its divisors is an integer number (100701860).

Almost surely, 2^1121611413 is an apocalyptic number.

1121611413 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1121611413 is a deficient number, since it is larger than the sum of its proper divisors (489618347).

1121611413 is a wasteful number, since it uses less digits than its factorization.

1121611413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12708.

The product of its digits is 144, while the sum is 21.

The square root of 1121611413 is about 33490.4674944976. The cubic root of 1121611413 is about 1038.9966324461.

Adding to 1121611413 its reverse (3141161211), we get a palindrome (4262772624).

The spelling of 1121611413 in words is "one billion, one hundred twenty-one million, six hundred eleven thousand, four hundred thirteen".