343440102221 has 4 divisors (see below), whose sum is σ = 345745069500. Its totient is φ = 341135134944.

The previous prime is 343440102193. The next prime is 343440102241. The reversal of 343440102221 is 122201044343.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122201044343 = 7 ⋅17457292049.

It can be written as a sum of positive squares in 2 ways, for example, as 13373766025 + 330066336196 = 115645^2 + 574514^2 .

It is a cyclic number.

It is not a de Polignac number, because 343440102221 - 2²² = 343435907917 is a prime.

It is a super-2 number, since 2×343440102221² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343440102241) 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, 1152483416 + ... + 1152483713.

It is an arithmetic number, because the mean of its divisors is an integer number (86436267375).

Almost surely, 2^343440102221 is an apocalyptic number.

It is an amenable number.

343440102221 is a deficient number, since it is larger than the sum of its proper divisors (2304967279).

343440102221 is a wasteful number, since it uses less digits than its factorization.

343440102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2304967278.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 343440102221 its reverse (122201044343), we get a palindrome (465641146564).

The spelling of 343440102221 in words is "three hundred forty-three billion, four hundred forty million, one hundred two thousand, two hundred twenty-one".