1340221121 has 8 divisors (see below), whose sum is σ = 1369933824. Its totient is φ = 1310558400.

The previous prime is 1340221111. The next prime is 1340221147. The reversal of 1340221121 is 1211220431.

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 1340221121 - 2²² = 1336026817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1340221121.

It is not an unprimeable number, because it can be changed into a prime (1340221111) 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, 44576 + ... + 68318.

It is an arithmetic number, because the mean of its divisors is an integer number (171241728).

Almost surely, 2^1340221121 is an apocalyptic number.

It is an amenable number.

1340221121 is a deficient number, since it is larger than the sum of its proper divisors (29712703).

1340221121 is a wasteful number, since it uses less digits than its factorization.

1340221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24991.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1340221121 is about 36609.0305935571. The cubic root of 1340221121 is about 1102.5344099310.

Adding to 1340221121 its reverse (1211220431), we get a palindrome (2551441552).

The spelling of 1340221121 in words is "one billion, three hundred forty million, two hundred twenty-one thousand, one hundred twenty-one".