321120021142 has 4 divisors (see below), whose sum is σ = 481680031716. Its totient is φ = 160560010570.

The previous prime is 321120021139. The next prime is 321120021163. The reversal of 321120021142 is 241120021123.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80280005284 + ... + 80280005287.

It is an arithmetic number, because the mean of its divisors is an integer number (120420007929).

Almost surely, 2^321120021142 is an apocalyptic number.

321120021142 is a deficient number, since it is larger than the sum of its proper divisors (160560010574).

321120021142 is a wasteful number, since it uses less digits than its factorization.

321120021142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160560010573.

The product of its (nonzero) digits is 192, while the sum is 19.

Subtracting from 321120021142 its sum of digits (19), we obtain a palindrome (321120021123).

Adding to 321120021142 its reverse (241120021123), we get a palindrome (562240042265).

The spelling of 321120021142 in words is "three hundred twenty-one billion, one hundred twenty million, twenty-one thousand, one hundred forty-two".