203121130213201 has 4 divisors (see below), whose sum is σ = 204582433308400. Its totient is φ = 201659827118004.

The previous prime is 203121130213189. The next prime is 203121130213273. The reversal of 203121130213201 is 102312031121302.

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 203121130213201 - 2¹⁵ = 203121130180433 is a prime.

It is a super-2 number, since 2×203121130213201² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203121130213601) 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, 730651547391 + ... + 730651547668.

It is an arithmetic number, because the mean of its divisors is an integer number (51145608327100).

Almost surely, 2^{203121130213201} is an apocalyptic number.

It is an amenable number.

203121130213201 is a deficient number, since it is larger than the sum of its proper divisors (1461303095199).

203121130213201 is a wasteful number, since it uses less digits than its factorization.

203121130213201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461303095198.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 203121130213201 its reverse (102312031121302), we get a palindrome (305433161334503).

The spelling of 203121130213201 in words is "two hundred three trillion, one hundred twenty-one billion, one hundred thirty million, two hundred thirteen thousand, two hundred one".