142020233221 has 4 divisors (see below), whose sum is σ = 142155362944. Its totient is φ = 141885103500.

The previous prime is 142020233213. The next prime is 142020233237. The reversal of 142020233221 is 122332020241.

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: 122332020241 = 379 ⋅322775779.

It is a cyclic number.

It is not a de Polignac number, because 142020233221 - 2³ = 142020233213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142020233192 and 142020233201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142020236221) 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, 67563285 + ... + 67565386.

It is an arithmetic number, because the mean of its divisors is an integer number (35538840736).

Almost surely, 2^142020233221 is an apocalyptic number.

It is an amenable number.

142020233221 is a deficient number, since it is larger than the sum of its proper divisors (135129723).

142020233221 is a wasteful number, since it uses less digits than its factorization.

142020233221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135129722.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 142020233221 its reverse (122332020241), we get a palindrome (264352253462).

The spelling of 142020233221 in words is "one hundred forty-two billion, twenty million, two hundred thirty-three thousand, two hundred twenty-one".