202101200121 has 4 divisors (see below), whose sum is σ = 269468266832. Its totient is φ = 134734133412.

The previous prime is 202101200117. The next prime is 202101200131. The reversal of 202101200121 is 121002101202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 202101200121 - 2² = 202101200117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202101200097 and 202101200106.

It is not an unprimeable number, because it can be changed into a prime (202101200131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33683533351 + ... + 33683533356.

It is an arithmetic number, because the mean of its divisors is an integer number (67367066708).

Almost surely, 2^202101200121 is an apocalyptic number.

It is an amenable number.

202101200121 is a deficient number, since it is larger than the sum of its proper divisors (67367066711).

202101200121 is an equidigital number, since it uses as much as digits as its factorization.

202101200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67367066710.

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

Adding to 202101200121 its reverse (121002101202), we get a palindrome (323103301323).

The spelling of 202101200121 in words is "two hundred two billion, one hundred one million, two hundred thousand, one hundred twenty-one".