11203122121 has 8 divisors (see below), whose sum is σ = 11479099464. Its totient is φ = 10927274880.

The previous prime is 11203122113. The next prime is 11203122127. The reversal of 11203122121 is 12122130211.

It can be written as a sum of positive squares in 4 ways, for example, as 1863225 + 11201258896 = 1365^2 + 105836^2 .

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 11203122121 - 2³ = 11203122113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11203122095 and 11203122104.

It is not an unprimeable number, because it can be changed into a prime (11203122127) 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, 154951 + ... + 215443.

It is an arithmetic number, because the mean of its divisors is an integer number (1434887433).

Almost surely, 2^11203122121 is an apocalyptic number.

It is an amenable number.

11203122121 is a deficient number, since it is larger than the sum of its proper divisors (275977343).

11203122121 is an equidigital number, since it uses as much as digits as its factorization.

11203122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65051.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 11203122121 its reverse (12122130211), we get a palindrome (23325252332).

The spelling of 11203122121 in words is "eleven billion, two hundred three million, one hundred twenty-two thousand, one hundred twenty-one".