142205412021 has 4 divisors (see below), whose sum is σ = 189607216032. Its totient is φ = 94803608012.

The previous prime is 142205412007. The next prime is 142205412031. The reversal of 142205412021 is 120214502241.

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 not a de Polignac number, because 142205412021 - 2⁵ = 142205411989 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 142205411982 and 142205412000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142205412031) 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, 23700902001 + ... + 23700902006.

It is an arithmetic number, because the mean of its divisors is an integer number (47401804008).

Almost surely, 2^142205412021 is an apocalyptic number.

It is an amenable number.

142205412021 is a deficient number, since it is larger than the sum of its proper divisors (47401804011).

142205412021 is an equidigital number, since it uses as much as digits as its factorization.

142205412021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47401804010.

The product of its (nonzero) digits is 1280, while the sum is 24.

Adding to 142205412021 its reverse (120214502241), we get a palindrome (262419914262).

The spelling of 142205412021 in words is "one hundred forty-two billion, two hundred five million, four hundred twelve thousand, twenty-one".