200121220010221 has 4 divisors (see below), whose sum is σ = 203513105095200. Its totient is φ = 196729334925244.

The previous prime is 200121220010207. The next prime is 200121220010237. The reversal of 200121220010221 is 122010022121002.

It is a happy number.

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 not a de Polignac number, because 200121220010221 - 2⁷ = 200121220010093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200121220010195 and 200121220010204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200121220010291) 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, 1695942542401 + ... + 1695942542518.

It is an arithmetic number, because the mean of its divisors is an integer number (50878276273800).

Almost surely, 2^{200121220010221} is an apocalyptic number.

It is an amenable number.

200121220010221 is a deficient number, since it is larger than the sum of its proper divisors (3391885084979).

200121220010221 is an equidigital number, since it uses as much as digits as its factorization.

200121220010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3391885084978.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 200121220010221 its reverse (122010022121002), we get a palindrome (322131242131223).

The spelling of 200121220010221 in words is "two hundred trillion, one hundred twenty-one billion, two hundred twenty million, ten thousand, two hundred twenty-one".