11110203121 has 8 divisors (see below), whose sum is σ = 11220244200. Its totient is φ = 11000309760.

The previous prime is 11110203031. The next prime is 11110203133. The reversal of 11110203121 is 12130201111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1517959521 + 9592243600 = 38961^2 + 97940^2 .

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 11110203121 - 2¹³ = 11110194929 is a prime.

It is a super-2 number, since 2×11110203121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11110273121) 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, 117411 + ... + 189751.

It is an arithmetic number, because the mean of its divisors is an integer number (1402530525).

Almost surely, 2^11110203121 is an apocalyptic number.

It is an amenable number.

11110203121 is a deficient number, since it is larger than the sum of its proper divisors (110041079).

11110203121 is a wasteful number, since it uses less digits than its factorization.

11110203121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73859.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 11110203121 its reverse (12130201111), we get a palindrome (23240404232).

The spelling of 11110203121 in words is "eleven billion, one hundred ten million, two hundred three thousand, one hundred twenty-one".