200123211101221 has 4 divisors (see below), whose sum is σ = 200123381118892. Its totient is φ = 200123041083552.

The previous prime is 200123211101201. The next prime is 200123211101293. The reversal of 200123211101221 is 122101112321002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38278659650625 + 161844551450596 = 6186975^2 + 12721814^2 .

It is a cyclic number.

It is not a de Polignac number, because 200123211101221 - 2⁴¹ = 197924187845669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200123211101201) 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, 83230830 + ... + 85601503.

It is an arithmetic number, because the mean of its divisors is an integer number (50030845279723).

Almost surely, 2^{200123211101221} is an apocalyptic number.

It is an amenable number.

200123211101221 is a deficient number, since it is larger than the sum of its proper divisors (170017671).

200123211101221 is a wasteful number, since it uses less digits than its factorization.

200123211101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170017670.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 200123211101221 its reverse (122101112321002), we get a palindrome (322224323422223).

The spelling of 200123211101221 in words is "two hundred trillion, one hundred twenty-three billion, two hundred eleven million, one hundred one thousand, two hundred twenty-one".