20121323220142 has 8 divisors (see below), whose sum is σ = 30182302810296. Its totient is φ = 10060555616712.

The previous prime is 20121323220137. The next prime is 20121323220217. The reversal of 20121323220142 is 24102232312102.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52759173 + ... + 53139184.

It is an arithmetic number, because the mean of its divisors is an integer number (3772787851287).

Almost surely, 2^{20121323220142} is an apocalyptic number.

20121323220142 is a deficient number, since it is larger than the sum of its proper divisors (10060979590154).

20121323220142 is a wasteful number, since it uses less digits than its factorization.

20121323220142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105993362.

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

Adding to 20121323220142 its reverse (24102232312102), we get a palindrome (44223555532244).

The spelling of 20121323220142 in words is "twenty trillion, one hundred twenty-one billion, three hundred twenty-three million, two hundred twenty thousand, one hundred forty-two".