204123220031 has 8 divisors (see below), whose sum is σ = 210721600128. Its totient is φ = 197525700000.

The previous prime is 204123220027. The next prime is 204123220033. The reversal of 204123220031 is 130022321402.

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

It is a cyclic number.

It is not a de Polignac number, because 204123220031 - 2² = 204123220027 is a prime.

It is a super-2 number, since 2×204123220031² (a number of 23 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 = 204123219985 and 204123220012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204123220033) 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, 285881 + ... + 699981.

It is an arithmetic number, because the mean of its divisors is an integer number (26340200016).

Almost surely, 2^204123220031 is an apocalyptic number.

204123220031 is a deficient number, since it is larger than the sum of its proper divisors (6598380097).

204123220031 is a wasteful number, since it uses less digits than its factorization.

204123220031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430033.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 204123220031 its reverse (130022321402), we get a palindrome (334145541433).

The spelling of 204123220031 in words is "two hundred four billion, one hundred twenty-three million, two hundred twenty thousand, thirty-one".