1340122221 has 12 divisors (see below), whose sum is σ = 1955689372. Its totient is φ = 884203776.

The previous prime is 1340122207. The next prime is 1340122243. The reversal of 1340122221 is 1222210431.

It is a happy number.

1340122221 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1023104196 + 317018025 = 31986^2 + 17805^2 .

It is not a de Polignac number, because 1340122221 - 2⁷ = 1340122093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1340122194 and 1340122203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340122261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 766666 + ... + 768411.

Almost surely, 2^1340122221 is an apocalyptic number.

It is an amenable number.

1340122221 is a deficient number, since it is larger than the sum of its proper divisors (615567151).

1340122221 is a wasteful number, since it uses less digits than its factorization.

1340122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1535180 (or 1535177 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1340122221 is about 36607.6798090237. The cubic root of 1340122221 is about 1102.5072891986.

Adding to 1340122221 its reverse (1222210431), we get a palindrome (2562332652).

The spelling of 1340122221 in words is "one billion, three hundred forty million, one hundred twenty-two thousand, two hundred twenty-one".