20112123322121 has 4 divisors (see below), whose sum is σ = 20112155553552. Its totient is φ = 20112091090692.

The previous prime is 20112123322063. The next prime is 20112123322217. The reversal of 20112123322121 is 12122332121102.

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 20112123322121 - 2¹⁴ = 20112123305737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20112123822121) 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, 15160871 + ... + 16433996.

It is an arithmetic number, because the mean of its divisors is an integer number (5028038888388).

Almost surely, 2^{20112123322121} is an apocalyptic number.

It is an amenable number.

20112123322121 is a deficient number, since it is larger than the sum of its proper divisors (32231431).

20112123322121 is an equidigital number, since it uses as much as digits as its factorization.

20112123322121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32231430.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 20112123322121 its reverse (12122332121102), we get a palindrome (32234455443223).

The spelling of 20112123322121 in words is "twenty trillion, one hundred twelve billion, one hundred twenty-three million, three hundred twenty-two thousand, one hundred twenty-one".