342115205021 has 4 divisors (see below), whose sum is σ = 342117383712. Its totient is φ = 342113026332.

The previous prime is 342115204997. The next prime is 342115205051. The reversal of 342115205021 is 120502511243.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-342115205021 is a prime.

It is a super-2 number, since 2×342115205021² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (342115205051) 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, 833825 + ... + 1174518.

It is an arithmetic number, because the mean of its divisors is an integer number (85529345928).

Almost surely, 2^342115205021 is an apocalyptic number.

It is an amenable number.

342115205021 is a deficient number, since it is larger than the sum of its proper divisors (2178691).

342115205021 is a wasteful number, since it uses less digits than its factorization.

342115205021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2178690.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 342115205021 its reverse (120502511243), we get a palindrome (462617716264).

The spelling of 342115205021 in words is "three hundred forty-two billion, one hundred fifteen million, two hundred five thousand, twenty-one".