205421200022 has 16 divisors (see below), whose sum is σ = 310425841152. Its totient is φ = 101947701480.

The previous prime is 205421200021. The next prime is 205421200079. The reversal of 205421200022 is 220002124502.

205421200022 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 205421199967 and 205421200003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205421200021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214238 + ... + 675825.

It is an arithmetic number, because the mean of its divisors is an integer number (19401615072).

Almost surely, 2^205421200022 is an apocalyptic number.

205421200022 is a deficient number, since it is larger than the sum of its proper divisors (105004641130).

205421200022 is a wasteful number, since it uses less digits than its factorization.

205421200022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890923.

The product of its (nonzero) digits is 640, while the sum is 20.

Adding to 205421200022 its reverse (220002124502), we get a palindrome (425423324524).

The spelling of 205421200022 in words is "two hundred five billion, four hundred twenty-one million, two hundred thousand, twenty-two".