20110420121 has 4 divisors (see below), whose sum is σ = 21938640144. Its totient is φ = 18282200100.

The previous prime is 20110420027. The next prime is 20110420129. The reversal of 20110420121 is 12102401102.

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 a de Polignac number, because none of the positive numbers 2^k-20110420121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20110420096 and 20110420105.

It is not an unprimeable number, because it can be changed into a prime (20110420129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 914109995 + ... + 914110016.

It is an arithmetic number, because the mean of its divisors is an integer number (5484660036).

Almost surely, 2^20110420121 is an apocalyptic number.

It is an amenable number.

20110420121 is a deficient number, since it is larger than the sum of its proper divisors (1828220023).

20110420121 is a wasteful number, since it uses less digits than its factorization.

20110420121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828220022.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20110420121 its reverse (12102401102), we get a palindrome (32212821223).

The spelling of 20110420121 in words is "twenty billion, one hundred ten million, four hundred twenty thousand, one hundred twenty-one".