204311245221131 has 4 divisors (see below), whose sum is σ = 204890030618712. Its totient is φ = 203732459823552.

The previous prime is 204311245221121. The next prime is 204311245221169. The reversal of 204311245221131 is 131122542113402.

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 204311245221131 - 2¹⁸ = 204311244958987 is a prime.

It is a super-2 number, since 2×204311245221131² (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 (204311245221121) 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, 289392698261 + ... + 289392698966.

It is an arithmetic number, because the mean of its divisors is an integer number (51222507654678).

Almost surely, 2^{204311245221131} is an apocalyptic number.

204311245221131 is a deficient number, since it is larger than the sum of its proper divisors (578785397581).

204311245221131 is an equidigital number, since it uses as much as digits as its factorization.

204311245221131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578785397580.

The product of its (nonzero) digits is 11520, while the sum is 32.

Adding to 204311245221131 its reverse (131122542113402), we get a palindrome (335433787334533).

The spelling of 204311245221131 in words is "two hundred four trillion, three hundred eleven billion, two hundred forty-five million, two hundred twenty-one thousand, one hundred thirty-one".