200120222122021 has 4 divisors (see below), whose sum is σ = 201956187462700. Its totient is φ = 198284256781344.

The previous prime is 200120222122003. The next prime is 200120222122049. The reversal of 200120222122021 is 120221222021002.

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 136724962773025 + 63395259348996 = 11692945^2 + 7962114^2 .

It is a cyclic number.

It is not a de Polignac number, because 200120222122021 - 2¹⁵ = 200120222089253 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 200120222122021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200120222122081) 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, 917982670176 + ... + 917982670393.

It is an arithmetic number, because the mean of its divisors is an integer number (50489046865675).

Almost surely, 2^{200120222122021} is an apocalyptic number.

It is an amenable number.

200120222122021 is a deficient number, since it is larger than the sum of its proper divisors (1835965340679).

200120222122021 is a wasteful number, since it uses less digits than its factorization.

200120222122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1835965340678.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 200120222122021 its reverse (120221222021002), we get a palindrome (320341444143023).

The spelling of 200120222122021 in words is "two hundred trillion, one hundred twenty billion, two hundred twenty-two million, one hundred twenty-two thousand, twenty-one".