20204121101 has 4 divisors (see below), whose sum is σ = 20220535104. Its totient is φ = 20187707100.

The previous prime is 20204121097. The next prime is 20204121107. The reversal of 20204121101 is 10112140202.

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 20204121101 - 2² = 20204121097 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20204121107) 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, 8205155 + ... + 8207616.

It is an arithmetic number, because the mean of its divisors is an integer number (5055133776).

Almost surely, 2^20204121101 is an apocalyptic number.

It is an amenable number.

20204121101 is a deficient number, since it is larger than the sum of its proper divisors (16414003).

20204121101 is a wasteful number, since it uses less digits than its factorization.

20204121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16414002.

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

Adding to 20204121101 its reverse (10112140202), we get a palindrome (30316261303).

The spelling of 20204121101 in words is "twenty billion, two hundred four million, one hundred twenty-one thousand, one hundred one".