1213440141 has 32 divisors (see below), whose sum is σ = 1762290432. Its totient is φ = 740579840.

The previous prime is 1213440119. The next prime is 1213440143. The reversal of 1213440141 is 1410443121.

It is a cyclic number.

It is not a de Polignac number, because 1213440141 - 2¹⁸ = 1213177997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213440143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 145891 + ... + 153983.

It is an arithmetic number, because the mean of its divisors is an integer number (55071576).

Almost surely, 2^1213440141 is an apocalyptic number.

It is an amenable number.

1213440141 is a deficient number, since it is larger than the sum of its proper divisors (548850291).

1213440141 is a wasteful number, since it uses less digits than its factorization.

1213440141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8213.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1213440141 is about 34834.4677151812. The cubic root of 1213440141 is about 1066.6111495302.

Adding to 1213440141 its reverse (1410443121), we get a palindrome (2623883262).

The spelling of 1213440141 in words is "one billion, two hundred thirteen million, four hundred forty thousand, one hundred forty-one".