346353403411221 has 16 divisors (see below), whose sum is σ = 461834706558720. Its totient is φ = 230887185220800.

The previous prime is 346353403411217. The next prime is 346353403411231. The reversal of 346353403411221 is 122114304353643.

It is not a de Polignac number, because 346353403411221 - 2² = 346353403411217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (346353403411231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4750973871 + ... + 4751046771.

It is an arithmetic number, because the mean of its divisors is an integer number (28864669159920).

Almost surely, 2^{346353403411221} is an apocalyptic number.

It is an amenable number.

346353403411221 is a deficient number, since it is larger than the sum of its proper divisors (115481303147499).

346353403411221 is a wasteful number, since it uses less digits than its factorization.

346353403411221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154636.

The product of its (nonzero) digits is 622080, while the sum is 42.

Adding to 346353403411221 its reverse (122114304353643), we get a palindrome (468467707764864).

The spelling of 346353403411221 in words is "three hundred forty-six trillion, three hundred fifty-three billion, four hundred three million, four hundred eleven thousand, two hundred twenty-one".