200122001110021 has 4 divisors (see below), whose sum is σ = 200122250942700. Its totient is φ = 200121751277344.

The previous prime is 200122001109983. The next prime is 200122001110027. The reversal of 200122001110021 is 120011100221002.

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 172951062979396 + 27170938130625 = 13151086^2 + 5212575^2 .

It is a cyclic number.

It is not a de Polignac number, because 200122001110021 - 2⁹ = 200122001109509 is a prime.

It is a super-2 number, since 2×200122001110021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200122001109983 and 200122001110010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200122001110027) 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, 123710926 + ... + 125318143.

It is an arithmetic number, because the mean of its divisors is an integer number (50030562735675).

Almost surely, 2^{200122001110021} is an apocalyptic number.

It is an amenable number.

200122001110021 is a deficient number, since it is larger than the sum of its proper divisors (249832679).

200122001110021 is an equidigital number, since it uses as much as digits as its factorization.

200122001110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249832678.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 200122001110021 its reverse (120011100221002), we get a palindrome (320133101331023).

The spelling of 200122001110021 in words is "two hundred trillion, one hundred twenty-two billion, one million, one hundred ten thousand, twenty-one".