1340112153221 has 4 divisors (see below), whose sum is σ = 1340118539244. Its totient is φ = 1340105767200.

The previous prime is 1340112153167. The next prime is 1340112153223. The reversal of 1340112153221 is 1223512110431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 307370448100 + 1032741705121 = 554410^2 + 1016239^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1340112153221 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 (1340112153223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2867150 + ... + 3301631.

It is an arithmetic number, because the mean of its divisors is an integer number (335029634811).

Almost surely, 2^{1340112153221} is an apocalyptic number.

It is an amenable number.

1340112153221 is a deficient number, since it is larger than the sum of its proper divisors (6386023).

1340112153221 is an equidigital number, since it uses as much as digits as its factorization.

1340112153221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6386022.

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 1340112153221 its reverse (1223512110431), we get a palindrome (2563624263652).

The spelling of 1340112153221 in words is "one trillion, three hundred forty billion, one hundred twelve million, one hundred fifty-three thousand, two hundred twenty-one".