204121011010031 has 2 divisors, whose sum is σ = 204121011010032. Its totient is φ = 204121011010030.

The previous prime is 204121011010003. The next prime is 204121011010039. The reversal of 204121011010031 is 130010110121402.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204121011010031 is a prime.

It is a super-2 number, since 2×204121011010031² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 204121011009991 and 204121011010009.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204121011010039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102060505505015 + 102060505505016.

It is an arithmetic number, because the mean of its divisors is an integer number (102060505505016).

Almost surely, 2^{204121011010031} is an apocalyptic number.

204121011010031 is a deficient number, since it is larger than the sum of its proper divisors (1).

204121011010031 is an equidigital number, since it uses as much as digits as its factorization.

204121011010031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 204121011010031 its reverse (130010110121402), we get a palindrome (334131121131433).

The spelling of 204121011010031 in words is "two hundred four trillion, one hundred twenty-one billion, eleven million, ten thousand, thirty-one".