20122121203 has 4 divisors (see below), whose sum is σ = 20135334888. Its totient is φ = 20108907520.

The previous prime is 20122121177. The next prime is 20122121207. The reversal of 20122121203 is 30212122102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20122121203 - 2¹⁷ = 20121990131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20122121207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6604558 + ... + 6607603.

It is an arithmetic number, because the mean of its divisors is an integer number (5033833722).

Almost surely, 2^20122121203 is an apocalyptic number.

20122121203 is a deficient number, since it is larger than the sum of its proper divisors (13213685).

20122121203 is a wasteful number, since it uses less digits than its factorization.

20122121203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13213684.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20122121203 its reverse (30212122102), we get a palindrome (50334243305).

The spelling of 20122121203 in words is "twenty billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred three".