200120021122021 has 32 divisors (see below), whose sum is σ = 268720189920000. Its totient is φ = 143927700871680.

The previous prime is 200120021122009. The next prime is 200120021122031. The reversal of 200120021122021 is 120221120021002.

It is a happy number.

It is not a de Polignac number, because 200120021122021 - 2¹¹ = 200120021119973 is a prime.

It is a super-2 number, since 2×200120021122021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 200120021121986 and 200120021122004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200120021122031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 494616 + ... + 20012113.

It is an arithmetic number, because the mean of its divisors is an integer number (8397505935000).

Almost surely, 2^{200120021122021} is an apocalyptic number.

It is an amenable number.

200120021122021 is a deficient number, since it is larger than the sum of its proper divisors (68600168797979).

200120021122021 is a wasteful number, since it uses less digits than its factorization.

200120021122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20516509.

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

Adding to 200120021122021 its reverse (120221120021002), we get a palindrome (320341141143023).

The spelling of 200120021122021 in words is "two hundred trillion, one hundred twenty billion, twenty-one million, one hundred twenty-two thousand, twenty-one".