142221431512321 has 24 divisors (see below), whose sum is σ = 167268157742400. Its totient is φ = 120561073792992.

The previous prime is 142221431512313. The next prime is 142221431512327. The reversal of 142221431512321 is 123215134122241.

It is a happy number.

It is not a de Polignac number, because 142221431512321 - 2³ = 142221431512313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142221431512327) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14791971 + ... + 22433128.

It is an arithmetic number, because the mean of its divisors is an integer number (6969506572600).

Almost surely, 2^{142221431512321} is an apocalyptic number.

It is an amenable number.

142221431512321 is a deficient number, since it is larger than the sum of its proper divisors (25046726230079).

142221431512321 is a wasteful number, since it uses less digits than its factorization.

142221431512321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37225973 (or 37225966 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

Adding to 142221431512321 its reverse (123215134122241), we get a palindrome (265436565634562).

The spelling of 142221431512321 in words is "one hundred forty-two trillion, two hundred twenty-one billion, four hundred thirty-one million, five hundred twelve thousand, three hundred twenty-one".