200121001101 has 24 divisors (see below), whose sum is σ = 330378008064. Its totient is φ = 114348097440.

The previous prime is 200121001057. The next prime is 200121001103. The reversal of 200121001101 is 101100121002.

It is a happy number.

It is not a de Polignac number, because 200121001101 - 2⁷ = 200121000973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200121001103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1099716 + ... + 1268706.

It is an arithmetic number, because the mean of its divisors is an integer number (13765750336).

Almost surely, 2^200121001101 is an apocalyptic number.

200121001101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

200121001101 is a deficient number, since it is larger than the sum of its proper divisors (130257006963).

200121001101 is a wasteful number, since it uses less digits than its factorization.

200121001101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187801 (or 187798 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 200121001101 its reverse (101100121002), we get a palindrome (301221122103).

The spelling of 200121001101 in words is "two hundred billion, one hundred twenty-one million, one thousand, one hundred one".