1340111221 has 2 divisors, whose sum is σ = 1340111222. Its totient is φ = 1340111220.

The previous prime is 1340111219. The next prime is 1340111231. The reversal of 1340111221 is 1221110431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1318488721 + 21622500 = 36311^2 + 4650^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340111221 - 2¹ = 1340111219 is a prime.

It is a super-2 number, since 2×1340111221² = 3591796169300221682, which contains 22 as substring.

Together with 1340111219, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1340111195 and 1340111204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340111231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670055610 + 670055611.

It is an arithmetic number, because the mean of its divisors is an integer number (670055611).

Almost surely, 2^1340111221 is an apocalyptic number.

It is an amenable number.

1340111221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340111221 is an equidigital number, since it uses as much as digits as its factorization.

1340111221 is an evil number, because the sum of its binary digits is even.

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

The square root of 1340111221 is about 36607.5295670167. The cubic root of 1340111221 is about 1102.5042726545.

Adding to 1340111221 its reverse (1221110431), we get a palindrome (2561221652).

The spelling of 1340111221 in words is "one billion, three hundred forty million, one hundred eleven thousand, two hundred twenty-one".