200123212221 has 60 divisors (see below), whose sum is σ = 322595602560. Its totient is φ = 123497375760.

The previous prime is 200123212199. The next prime is 200123212229. The reversal of 200123212221 is 122212321002.

200123212221 is a `hidden beast` number, since 200 + 1 + 232 + 12 + 221 = 666.

It is not a de Polignac number, because 200123212221 - 2⁵ = 200123212189 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 200123212194 and 200123212203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200123212229) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 1252990 + ... + 1403648.

It is an arithmetic number, because the mean of its divisors is an integer number (5376593376).

Almost surely, 2^200123212221 is an apocalyptic number.

It is an amenable number.

200123212221 is a deficient number, since it is larger than the sum of its proper divisors (122472390339).

200123212221 is a wasteful number, since it uses less digits than its factorization.

200123212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150748 (or 150716 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 200123212221 its reverse (122212321002), we get a palindrome (322335533223).

The spelling of 200123212221 in words is "two hundred billion, one hundred twenty-three million, two hundred twelve thousand, two hundred twenty-one".