203121002013 has 8 divisors (see below), whose sum is σ = 270855838848. Its totient is φ = 135400083264.

The previous prime is 203121001903. The next prime is 203121002027. The reversal of 203121002013 is 310200121302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 203121002013 - 2¹⁷ = 203120870941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 203121001983 and 203121002001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203121002033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3445420 + ... + 3503877.

It is an arithmetic number, because the mean of its divisors is an integer number (33856979856).

Almost surely, 2^203121002013 is an apocalyptic number.

It is an amenable number.

203121002013 is a deficient number, since it is larger than the sum of its proper divisors (67734836835).

203121002013 is an equidigital number, since it uses as much as digits as its factorization.

203121002013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6959043.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 203121002013 its reverse (310200121302), we get a palindrome (513321123315).

The spelling of 203121002013 in words is "two hundred three billion, one hundred twenty-one million, two thousand, thirteen".