20112020121 has 4 divisors (see below), whose sum is σ = 26816026832. Its totient is φ = 13408013412.

The previous prime is 20112020083. The next prime is 20112020129. The reversal of 20112020121 is 12102021102.

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 20112020121 - 2¹⁵ = 20111987353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20112020097 and 20112020106.

It is not an unprimeable number, because it can be changed into a prime (20112020129) 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, 3352003351 + ... + 3352003356.

It is an arithmetic number, because the mean of its divisors is an integer number (6704006708).

Almost surely, 2^20112020121 is an apocalyptic number.

It is an amenable number.

20112020121 is a deficient number, since it is larger than the sum of its proper divisors (6704006711).

20112020121 is an equidigital number, since it uses as much as digits as its factorization.

20112020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6704006710.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20112020121 its reverse (12102021102), we get a palindrome (32214041223).

The spelling of 20112020121 in words is "twenty billion, one hundred twelve million, twenty thousand, one hundred twenty-one".