202111113121 has 8 divisors (see below), whose sum is σ = 202497468264. Its totient is φ = 201725082240.

The previous prime is 202111113109. The next prime is 202111113181. The reversal of 202111113121 is 121311111202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8831300625 + 193279812496 = 93975^2 + 439636^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 202111113121 - 2⁵ = 202111113089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202111113095 and 202111113104.

It is not an unprimeable number, because it can be changed into a prime (202111113181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1185541 + ... + 1345261.

It is an arithmetic number, because the mean of its divisors is an integer number (25312183533).

Almost surely, 2^202111113121 is an apocalyptic number.

It is an amenable number.

202111113121 is a deficient number, since it is larger than the sum of its proper divisors (386355143).

202111113121 is a wasteful number, since it uses less digits than its factorization.

202111113121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162131.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 202111113121 its reverse (121311111202), we get a palindrome (323422224323).

The spelling of 202111113121 in words is "two hundred two billion, one hundred eleven million, one hundred thirteen thousand, one hundred twenty-one".