200221220222121 has 32 divisors (see below), whose sum is σ = 321391780853760. Its totient is φ = 108311143977216.

The previous prime is 200221220222069. The next prime is 200221220222129. The reversal of 200221220222121 is 121222022122002.

It is not a de Polignac number, because 200221220222121 - 2²⁶ = 200221153113257 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (200221220222129) 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, 182997936 + ... + 184088801.

It is an arithmetic number, because the mean of its divisors is an integer number (10043493151680).

Almost surely, 2^{200221220222121} is an apocalyptic number.

200221220222121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

200221220222121 is a deficient number, since it is larger than the sum of its proper divisors (121170560631639).

200221220222121 is a wasteful number, since it uses less digits than its factorization.

200221220222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367088133.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 200221220222121 its reverse (121222022122002), we get a palindrome (321443242344123).

The spelling of 200221220222121 in words is "two hundred trillion, two hundred twenty-one billion, two hundred twenty million, two hundred twenty-two thousand, one hundred twenty-one".