203122001121 has 16 divisors (see below), whose sum is σ = 292692985536. Its totient is φ = 124556458176.

The previous prime is 203122001107. The next prime is 203122001123. The reversal of 203122001121 is 121100221302.

It is not a de Polignac number, because 203122001121 - 2¹⁵ = 203121968353 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 203122001121.

It is not an unprimeable number, because it can be changed into a prime (203122001123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9190830 + ... + 9212903.

It is an arithmetic number, because the mean of its divisors is an integer number (18293311596).

Almost surely, 2^203122001121 is an apocalyptic number.

It is an amenable number.

203122001121 is a deficient number, since it is larger than the sum of its proper divisors (89570984415).

203122001121 is a wasteful number, since it uses less digits than its factorization.

203122001121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18404032.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 203122001121 its reverse (121100221302), we get a palindrome (324222222423).

The spelling of 203122001121 in words is "two hundred three billion, one hundred twenty-two million, one thousand, one hundred twenty-one".