342106561021 has 4 divisors (see below), whose sum is σ = 342505752732. Its totient is φ = 341707369312.

The previous prime is 342106561007. The next prime is 342106561039. The reversal of 342106561021 is 120165601243.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 281462080900 + 60644480121 = 530530^2 + 246261^2 .

It is a cyclic number.

It is not a de Polignac number, because 342106561021 - 2¹⁹ = 342106036733 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 (342106561921) 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, 199594570 + ... + 199596283.

It is an arithmetic number, because the mean of its divisors is an integer number (85626438183).

Almost surely, 2^342106561021 is an apocalyptic number.

It is an amenable number.

342106561021 is a deficient number, since it is larger than the sum of its proper divisors (399191711).

342106561021 is an equidigital number, since it uses as much as digits as its factorization.

342106561021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399191710.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 342106561021 in words is "three hundred forty-two billion, one hundred six million, five hundred sixty-one thousand, twenty-one".