203121301123031 has 4 divisors (see below), whose sum is σ = 213811895919000. Its totient is φ = 192430706327064.

The previous prime is 203121301123009. The next prime is 203121301123033. The reversal of 203121301123031 is 130321103121302.

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 203121301123031 - 2²² = 203121296928727 is a prime.

It is a super-2 number, since 2×203121301123031² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203121301122988 and 203121301123006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203121301123033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5345297397956 + ... + 5345297397993.

It is an arithmetic number, because the mean of its divisors is an integer number (53452973979750).

Almost surely, 2^{203121301123031} is an apocalyptic number.

203121301123031 is a deficient number, since it is larger than the sum of its proper divisors (10690594795969).

203121301123031 is a wasteful number, since it uses less digits than its factorization.

203121301123031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10690594795968.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 203121301123031 its reverse (130321103121302), we get a palindrome (333442404244333).

The spelling of 203121301123031 in words is "two hundred three trillion, one hundred twenty-one billion, three hundred one million, one hundred twenty-three thousand, thirty-one".