204063146221 has 4 divisors (see below), whose sum is σ = 222614341344. Its totient is φ = 185511951100.

The previous prime is 204063146197. The next prime is 204063146227. The reversal of 204063146221 is 122641360402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204063146221 is a prime.

It is a super-2 number, since 2×204063146221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204063146227) 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, 9275597545 + ... + 9275597566.

It is an arithmetic number, because the mean of its divisors is an integer number (55653585336).

Almost surely, 2^204063146221 is an apocalyptic number.

It is an amenable number.

204063146221 is a deficient number, since it is larger than the sum of its proper divisors (18551195123).

204063146221 is a wasteful number, since it uses less digits than its factorization.

204063146221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18551195122.

The product of its (nonzero) digits is 13824, while the sum is 31.

The spelling of 204063146221 in words is "two hundred four billion, sixty-three million, one hundred forty-six thousand, two hundred twenty-one".