20022101200121 has 4 divisors (see below), whose sum is σ = 20023416987252. Its totient is φ = 20020785412992.

The previous prime is 20022101200111. The next prime is 20022101200169. The reversal of 20022101200121 is 12100210122002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8872772838400 + 11149328361721 = 2978720^2 + 3339061^2 .

It is a cyclic number.

It is not a de Polignac number, because 20022101200121 - 2¹⁸ = 20022100937977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20022101200096 and 20022101200105.

It is not an unprimeable number, because it can be changed into a prime (20022101200111) 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 3 ways as a sum of consecutive naturals, for example, 657870740 + ... + 657901173.

It is an arithmetic number, because the mean of its divisors is an integer number (5005854246813).

Almost surely, 2^{20022101200121} is an apocalyptic number.

It is an amenable number.

20022101200121 is a deficient number, since it is larger than the sum of its proper divisors (1315787131).

20022101200121 is a wasteful number, since it uses less digits than its factorization.

20022101200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315787130.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20022101200121 its reverse (12100210122002), we get a palindrome (32122311322123).

The spelling of 20022101200121 in words is "twenty trillion, twenty-two billion, one hundred one million, two hundred thousand, one hundred twenty-one".