11121300121 has 4 divisors (see below), whose sum is σ = 11273646772. Its totient is φ = 10968953472.

The previous prime is 11121300109. The next prime is 11121300137. The reversal of 11121300121 is 12100312111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1965680896 + 9155619225 = 44336^2 + 95685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11121300121 is a prime.

It is a super-2 number, since 2×11121300121² (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 (11121306121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76173216 + ... + 76173361.

It is an arithmetic number, because the mean of its divisors is an integer number (2818411693).

Almost surely, 2^11121300121 is an apocalyptic number.

It is an amenable number.

11121300121 is a deficient number, since it is larger than the sum of its proper divisors (152346651).

11121300121 is an equidigital number, since it uses as much as digits as its factorization.

11121300121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152346650.

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

Adding to 11121300121 its reverse (12100312111), we get a palindrome (23221612232).

The spelling of 11121300121 in words is "eleven billion, one hundred twenty-one million, three hundred thousand, one hundred twenty-one".