345343501021 has 4 divisors (see below), whose sum is σ = 360358435872. Its totient is φ = 330328566172.

The previous prime is 345343501007. The next prime is 345343501033. The reversal of 345343501021 is 120105343543.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120105343543 = 41 ⋅2929398623.

It is a cyclic number.

It is not a de Polignac number, because 345343501021 - 2²⁹ = 344806630109 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 (345343501051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7507467391 + ... + 7507467436.

It is an arithmetic number, because the mean of its divisors is an integer number (90089608968).

Almost surely, 2^345343501021 is an apocalyptic number.

It is an amenable number.

345343501021 is a deficient number, since it is larger than the sum of its proper divisors (15014934851).

345343501021 is a wasteful number, since it uses less digits than its factorization.

345343501021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15014934850.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 345343501021 its reverse (120105343543), we get a palindrome (465448844564).

The spelling of 345343501021 in words is "three hundred forty-five billion, three hundred forty-three million, five hundred one thousand, twenty-one".