20110120231121 has 4 divisors (see below), whose sum is σ = 20984473284672. Its totient is φ = 19235767177572.

The previous prime is 20110120231087. The next prime is 20110120231129. The reversal of 20110120231121 is 12113202101102.

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 a cyclic number.

It is not a de Polignac number, because 20110120231121 - 2¹⁰ = 20110120230097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20110120231121.

It is not an unprimeable number, because it can be changed into a prime (20110120231129) 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, 437176526741 + ... + 437176526786.

It is an arithmetic number, because the mean of its divisors is an integer number (5246118321168).

Almost surely, 2^{20110120231121} is an apocalyptic number.

It is an amenable number.

20110120231121 is a deficient number, since it is larger than the sum of its proper divisors (874353053551).

20110120231121 is an equidigital number, since it uses as much as digits as its factorization.

20110120231121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874353053550.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 20110120231121 its reverse (12113202101102), we get a palindrome (32223322332223).

The spelling of 20110120231121 in words is "twenty trillion, one hundred ten billion, one hundred twenty million, two hundred thirty-one thousand, one hundred twenty-one".