142321232122165 has 4 divisors (see below), whose sum is σ = 170785478546604. Its totient is φ = 113856985697728.

The previous prime is 142321232122159. The next prime is 142321232122171. The reversal of 142321232122165 is 561221232123241.

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

It is an interprime number because it is at equal distance from previous prime (142321232122159) and next prime (142321232122171).

It can be written as a sum of positive squares in 2 ways, for example, as 25763319274564 + 116557912847601 = 5075758^2 + 10796199^2 .

It is a cyclic number.

It is not a de Polignac number, because 142321232122165 - 2⁴⁷ = 1583743766837 is a prime.

It is a super-2 number, since 2×142321232122165² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14232123212212 + ... + 14232123212221.

It is an arithmetic number, because the mean of its divisors is an integer number (42696369636651).

Almost surely, 2^{142321232122165} is an apocalyptic number.

It is an amenable number.

142321232122165 is a deficient number, since it is larger than the sum of its proper divisors (28464246424439).

142321232122165 is an equidigital number, since it uses as much as digits as its factorization.

142321232122165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28464246424438.

The product of its digits is 69120, while the sum is 37.

The spelling of 142321232122165 in words is "one hundred forty-two trillion, three hundred twenty-one billion, two hundred thirty-two million, one hundred twenty-two thousand, one hundred sixty-five".