200121021122021 has 8 divisors (see below), whose sum is σ = 212761971596160. Its totient is φ = 187808407023952.

The previous prime is 200121021121993. The next prime is 200121021122101. The reversal of 200121021122021 is 120221120121002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200121021122021 is a prime.

It is a super-2 number, since 2×200121021122021² (a number of 29 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 (200121021622021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82084092761 + ... + 82084095198.

It is an arithmetic number, because the mean of its divisors is an integer number (26595246449520).

Almost surely, 2^{200121021122021} is an apocalyptic number.

It is an amenable number.

200121021122021 is a deficient number, since it is larger than the sum of its proper divisors (12640950474139).

200121021122021 is a wasteful number, since it uses less digits than its factorization.

200121021122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164168188035.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 200121021122021 its reverse (120221120121002), we get a palindrome (320342141243023).

The spelling of 200121021122021 in words is "two hundred trillion, one hundred twenty-one billion, twenty-one million, one hundred twenty-two thousand, twenty-one".