1221112141 has 8 divisors (see below), whose sum is σ = 1233338400. Its totient is φ = 1208901168.

The previous prime is 1221112133. The next prime is 1221112153. The reversal of 1221112141 is 1412111221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1221112141 - 2³ = 1221112133 is a prime.

It is a super-2 number, since 2×1221112141² = 2982229721795207762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221112171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221875 + ... + 227311.

It is an arithmetic number, because the mean of its divisors is an integer number (154167300).

Almost surely, 2^1221112141 is an apocalyptic number.

It is an amenable number.

1221112141 is a deficient number, since it is larger than the sum of its proper divisors (12226259).

1221112141 is a wasteful number, since it uses less digits than its factorization.

1221112141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7643.

The product of its digits is 32, while the sum is 16.

The square root of 1221112141 is about 34944.4150187122. The cubic root of 1221112141 is about 1068.8543188940.

Adding to 1221112141 its reverse (1412111221), we get a palindrome (2633223362).

The spelling of 1221112141 in words is "one billion, two hundred twenty-one million, one hundred twelve thousand, one hundred forty-one".