142231430421221 has 8 divisors (see below), whose sum is σ = 143829793301400. Its totient is φ = 140633073250560.

The previous prime is 142231430421217. The next prime is 142231430421253. The reversal of 142231430421221 is 122124034132241.

It can be written as a sum of positive squares in 4 ways, for example, as 45198863460100 + 97032566961121 = 6723010^2 + 9850511^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 142231430421221 - 2² = 142231430421217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142231430451221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67006961 + ... + 69097001.

It is an arithmetic number, because the mean of its divisors is an integer number (17978724162675).

Almost surely, 2^{142231430421221} is an apocalyptic number.

It is an amenable number.

142231430421221 is a deficient number, since it is larger than the sum of its proper divisors (1598362880179).

142231430421221 is an equidigital number, since it uses as much as digits as its factorization.

142231430421221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2854759.

The product of its (nonzero) digits is 18432, while the sum is 32.

Adding to 142231430421221 its reverse (122124034132241), we get a palindrome (264355464553462).

The spelling of 142231430421221 in words is "one hundred forty-two trillion, two hundred thirty-one billion, four hundred thirty million, four hundred twenty-one thousand, two hundred twenty-one".