20142120210321 has 4 divisors (see below), whose sum is σ = 26856160280432. Its totient is φ = 13428080140212.

The previous prime is 20142120210307. The next prime is 20142120210343. The reversal of 20142120210321 is 12301202124102.

It is a happy number.

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 not a de Polignac number, because 20142120210321 - 2²⁷ = 20141985992593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20142120210391) 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, 3357020035051 + ... + 3357020035056.

It is an arithmetic number, because the mean of its divisors is an integer number (6714040070108).

Almost surely, 2^{20142120210321} is an apocalyptic number.

It is an amenable number.

20142120210321 is a deficient number, since it is larger than the sum of its proper divisors (6714040070111).

20142120210321 is an equidigital number, since it uses as much as digits as its factorization.

20142120210321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6714040070110.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 20142120210321 its reverse (12301202124102), we get a palindrome (32443322334423).

The spelling of 20142120210321 in words is "twenty trillion, one hundred forty-two billion, one hundred twenty million, two hundred ten thousand, three hundred twenty-one".