1213111141 has 16 divisors (see below), whose sum is σ = 1355904000. Its totient is φ = 1075803120.

The previous prime is 1213111139. The next prime is 1213111187. The reversal of 1213111141 is 1411113121.

It is a cyclic number.

It is not a de Polignac number, because 1213111141 - 2¹ = 1213111139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213111121) 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, 605860 + ... + 607858.

It is an arithmetic number, because the mean of its divisors is an integer number (84744000).

Almost surely, 2^1213111141 is an apocalyptic number.

1213111141 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1213111141 is a deficient number, since it is larger than the sum of its proper divisors (142792859).

1213111141 is a wasteful number, since it uses less digits than its factorization.

1213111141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3336.

The product of its digits is 24, while the sum is 16.

The square root of 1213111141 is about 34829.7450607954. The cubic root of 1213111141 is about 1066.5147440640.

Adding to 1213111141 its reverse (1411113121), we get a palindrome (2624224262).

The spelling of 1213111141 in words is "one billion, two hundred thirteen million, one hundred eleven thousand, one hundred forty-one".