200122221021 has 16 divisors (see below), whose sum is σ = 273351371328. Its totient is φ = 130154268800.

The previous prime is 200122220999. The next prime is 200122221023. The reversal of 200122221021 is 120122221002.

It is a cyclic number.

It is not a de Polignac number, because 200122221021 - 2²¹ = 200120123869 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200122221023) 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, 4251706 + ... + 4298516.

It is an arithmetic number, because the mean of its divisors is an integer number (17084460708).

Almost surely, 2^200122221021 is an apocalyptic number.

It is an amenable number.

200122221021 is a deficient number, since it is larger than the sum of its proper divisors (73229150307).

200122221021 is a wasteful number, since it uses less digits than its factorization.

200122221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81612.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 200122221021 its reverse (120122221002), we get a palindrome (320244442023).

The spelling of 200122221021 in words is "two hundred billion, one hundred twenty-two million, two hundred twenty-one thousand, twenty-one".