202101121121 has 12 divisors (see below), whose sum is σ = 204401854548. Its totient is φ = 199825632864.

The previous prime is 202101121021. The next prime is 202101121151. The reversal of 202101121121 is 121121101202.

It can be written as a sum of positive squares in 2 ways, for example, as 30228690496 + 171872430625 = 173864^2 + 414575^2 .

It is not a de Polignac number, because 202101121121 - 2¹⁰ = 202101120097 is a prime.

It is a super-2 number, since 2×202101121121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202101121096 and 202101121105.

It is not an unprimeable number, because it can be changed into a prime (202101121151) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6913091 + ... + 6942263.

It is an arithmetic number, because the mean of its divisors is an integer number (17033487879).

Almost surely, 2^202101121121 is an apocalyptic number.

It is an amenable number.

202101121121 is a deficient number, since it is larger than the sum of its proper divisors (2300733427).

202101121121 is an equidigital number, since it uses as much as digits as its factorization.

202101121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30032 (or 29929 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 202101121121 its reverse (121121101202), we get a palindrome (323222222323).

The spelling of 202101121121 in words is "two hundred two billion, one hundred one million, one hundred twenty-one thousand, one hundred twenty-one".