1240121311 has 8 divisors (see below), whose sum is σ = 1456925904. Its totient is φ = 1040661120.

The previous prime is 1240121251. The next prime is 1240121327. The reversal of 1240121311 is 1131210421.

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 1240121311 - 2⁹ = 1240120799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240121371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4335946 + ... + 4336231.

It is an arithmetic number, because the mean of its divisors is an integer number (182115738).

Almost surely, 2^1240121311 is an apocalyptic number.

1240121311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1240121311 is a deficient number, since it is larger than the sum of its proper divisors (216804593).

1240121311 is a wasteful number, since it uses less digits than its factorization.

1240121311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8672201.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1240121311 is about 35215.3561816433. The cubic root of 1240121311 is about 1074.3721044983.

Adding to 1240121311 its reverse (1131210421), we get a palindrome (2371331732).

The spelling of 1240121311 in words is "one billion, two hundred forty million, one hundred twenty-one thousand, three hundred eleven".