1340222212421 has 8 divisors (see below), whose sum is σ = 1409935701600. Its totient is φ = 1272075318640.

The previous prime is 1340222212411. The next prime is 1340222212451. The reversal of 1340222212421 is 1242122220431.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-1340222212421 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 (1340222212411) 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, 391647095 + ... + 391650516.

It is an arithmetic number, because the mean of its divisors is an integer number (176241962700).

Almost surely, 2^{1340222212421} is an apocalyptic number.

It is an amenable number.

1340222212421 is a deficient number, since it is larger than the sum of its proper divisors (69713489179).

1340222212421 is an equidigital number, since it uses as much as digits as its factorization.

1340222212421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783297699.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 1340222212421 its reverse (1242122220431), we get a palindrome (2582344432852).

The spelling of 1340222212421 in words is "one trillion, three hundred forty billion, two hundred twenty-two million, two hundred twelve thousand, four hundred twenty-one".