1240001321135 has 16 divisors (see below), whose sum is σ = 1510266815616. Its totient is φ = 977158673568.

The previous prime is 1240001321131. The next prime is 1240001321149. The reversal of 1240001321135 is 5311231000421.

It is a cyclic number.

It is not a de Polignac number, because 1240001321135 - 2² = 1240001321131 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 1240001321135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240001321131) 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, 12184532 + ... + 12285878.

It is an arithmetic number, because the mean of its divisors is an integer number (94391675976).

Almost surely, 2^{1240001321135} is an apocalyptic number.

1240001321135 is a deficient number, since it is larger than the sum of its proper divisors (270265494481).

1240001321135 is a wasteful number, since it uses less digits than its factorization.

1240001321135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137942.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 1240001321135 its reverse (5311231000421), we get a palindrome (6551232321556).

The spelling of 1240001321135 in words is "one trillion, two hundred forty billion, one million, three hundred twenty-one thousand, one hundred thirty-five".