142232123020021 has 8 divisors (see below), whose sum is σ = 143898559094840. Its totient is φ = 140572260658368.

The previous prime is 142232123020007. The next prime is 142232123020037. The reversal of 142232123020021 is 120020321232241.

It can be written as a sum of positive squares in 4 ways, for example, as 87423435002500 + 54808688017521 = 9350050^2 + 7403289^2 .

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 142232123020021 - 2⁹ = 142232123019509 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 (142232123020321) 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, 1643384766 + ... + 1643471311.

It is an arithmetic number, because the mean of its divisors is an integer number (17987319886855).

Almost surely, 2^{142232123020021} is an apocalyptic number.

It is an amenable number.

142232123020021 is a deficient number, since it is larger than the sum of its proper divisors (1666436074819).

142232123020021 is a wasteful number, since it uses less digits than its factorization.

142232123020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3286856583.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 142232123020021 its reverse (120020321232241), we get a palindrome (262252444252262).

The spelling of 142232123020021 in words is "one hundred forty-two trillion, two hundred thirty-two billion, one hundred twenty-three million, twenty thousand, twenty-one".