1340211221 has 8 divisors (see below), whose sum is σ = 1366176000. Its totient is φ = 1314471600.

The previous prime is 1340211199. The next prime is 1340211241. The reversal of 1340211221 is 1221120431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1340211221 is a prime.

It is a super-2 number, since 2×1340211221² = 3592332233788621682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1340211221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340211241) 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, 44246 + ... + 68103.

It is an arithmetic number, because the mean of its divisors is an integer number (170772000).

Almost surely, 2^1340211221 is an apocalyptic number.

It is an amenable number.

1340211221 is a deficient number, since it is larger than the sum of its proper divisors (25964779).

1340211221 is a wasteful number, since it uses less digits than its factorization.

1340211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112579.

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

The square root of 1340211221 is about 36608.8953807678. The cubic root of 1340211221 is about 1102.5316951757.

Adding to 1340211221 its reverse (1221120431), we get a palindrome (2561331652).

The spelling of 1340211221 in words is "one billion, three hundred forty million, two hundred eleven thousand, two hundred twenty-one".