342444020021 has 4 divisors (see below), whose sum is σ = 353490601344. Its totient is φ = 331397438700.

The previous prime is 342444020003. The next prime is 342444020053. The reversal of 342444020021 is 120020444243.

It is a happy number.

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: 120020444243 = 7 ⋅17145777749.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-342444020021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (342444020071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5523290615 + ... + 5523290676.

It is an arithmetic number, because the mean of its divisors is an integer number (88372650336).

Almost surely, 2^342444020021 is an apocalyptic number.

342444020021 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

342444020021 is a deficient number, since it is larger than the sum of its proper divisors (11046581323).

342444020021 is a wasteful number, since it uses less digits than its factorization.

342444020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11046581322.

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 342444020021 its reverse (120020444243), we get a palindrome (462464464264).

The spelling of 342444020021 in words is "three hundred forty-two billion, four hundred forty-four million, twenty thousand, twenty-one".