202101121 has 4 divisors (see below), whose sum is σ = 208620544. Its totient is φ = 195581700.

The previous prime is 202101091. The next prime is 202101127. The reversal of 202101121 is 121101202.

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 a cyclic number.

It is not a de Polignac number, because 202101121 - 2⁵ = 202101089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202101098 and 202101107.

It is not an unprimeable number, because it can be changed into a prime (202101127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3259665 + ... + 3259726.

It is an arithmetic number, because the mean of its divisors is an integer number (52155136).

Almost surely, 2^202101121 is an apocalyptic number.

It is an amenable number.

202101121 is a deficient number, since it is larger than the sum of its proper divisors (6519423).

202101121 is an equidigital number, since it uses as much as digits as its factorization.

202101121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6519422.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 202101121 is about 14216.2273828186. The cubic root of 202101121 is about 586.8443227387.

Adding to 202101121 its reverse (121101202), we get a palindrome (323202323).

The spelling of 202101121 in words is "two hundred two million, one hundred one thousand, one hundred twenty-one".