200121022101 has 64 divisors (see below), whose sum is σ = 367941482496. Its totient is φ = 93368505600.

The previous prime is 200121022081. The next prime is 200121022103. The reversal of 200121022101 is 101220121002.

It is not a de Polignac number, because 200121022101 - 2¹⁰ = 200121021077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200121022103) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 789435 + ... + 1011656.

It is an arithmetic number, because the mean of its divisors is an integer number (5749085664).

Almost surely, 2^200121022101 is an apocalyptic number.

200121022101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

200121022101 is a deficient number, since it is larger than the sum of its proper divisors (167820460395).

200121022101 is a wasteful number, since it uses less digits than its factorization.

200121022101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1801162.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 200121022101 its reverse (101220121002), we get a palindrome (301341143103).

The spelling of 200121022101 in words is "two hundred billion, one hundred twenty-one million, twenty-two thousand, one hundred one".