203030442121 has 16 divisors (see below), whose sum is σ = 228729441024. Its totient is φ = 178812684864.

The previous prime is 203030442107. The next prime is 203030442137. The reversal of 203030442121 is 121244030302.

It is a cyclic number.

It is not a de Polignac number, because 203030442121 - 2⁵ = 203030442089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203030442092 and 203030442101.

It is not an unprimeable number, because it can be changed into a prime (203030442821) 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, 736501 + ... + 973906.

It is an arithmetic number, because the mean of its divisors is an integer number (14295590064).

Almost surely, 2^203030442121 is an apocalyptic number.

It is an amenable number.

203030442121 is a deficient number, since it is larger than the sum of its proper divisors (25698998903).

203030442121 is a wasteful number, since it uses less digits than its factorization.

203030442121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1710840.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 203030442121 its reverse (121244030302), we get a palindrome (324274472423).

The spelling of 203030442121 in words is "two hundred three billion, thirty million, four hundred forty-two thousand, one hundred twenty-one".