200120020021021 has 16 divisors (see below), whose sum is σ = 206960012582400. Its totient is φ = 193406640034608.

The previous prime is 200120020021001. The next prime is 200120020021063. The reversal of 200120020021021 is 120120020021002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 200120020021021 - 2⁵ = 200120020020989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200120020020992 and 200120020021010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200120020021001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48334551 + ... + 52311268.

It is an arithmetic number, because the mean of its divisors is an integer number (12935000786400).

Almost surely, 2^{200120020021021} is an apocalyptic number.

It is an amenable number.

200120020021021 is a deficient number, since it is larger than the sum of its proper divisors (6839992561379).

200120020021021 is a wasteful number, since it uses less digits than its factorization.

200120020021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100646448.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 200120020021021 its reverse (120120020021002), we get a palindrome (320240040042023).

The spelling of 200120020021021 in words is "two hundred trillion, one hundred twenty billion, twenty million, twenty-one thousand, twenty-one".