343220031343021 has 32 divisors (see below), whose sum is σ = 429476132689920. Its totient is φ = 267480746035200.

The previous prime is 343220031342977. The next prime is 343220031343027. The reversal of 343220031343021 is 120343130022343.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 343220031343021 - 2²⁹ = 343219494472109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343220031343027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79657350 + ... + 83855431.

It is an arithmetic number, because the mean of its divisors is an integer number (13421129146560).

Almost surely, 2^{343220031343021} is an apocalyptic number.

343220031343021 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

343220031343021 is a deficient number, since it is larger than the sum of its proper divisors (86256101346899).

343220031343021 is a wasteful number, since it uses less digits than its factorization.

343220031343021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163513405.

The product of its (nonzero) digits is 31104, while the sum is 31.

Adding to 343220031343021 its reverse (120343130022343), we get a palindrome (463563161365364).

The spelling of 343220031343021 in words is "three hundred forty-three trillion, two hundred twenty billion, thirty-one million, three hundred forty-three thousand, twenty-one".