11231001121 has 4 divisors (see below), whose sum is σ = 11256353712. Its totient is φ = 11205648532.

The previous prime is 11231001107. The next prime is 11231001143. The reversal of 11231001121 is 12110013211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11231001121 - 2¹⁹ = 11230476833 is a prime.

It is a super-2 number, since 2×11231001121² (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 (11231001421) 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, 12675631 + ... + 12676516.

It is an arithmetic number, because the mean of its divisors is an integer number (2814088428).

Almost surely, 2^11231001121 is an apocalyptic number.

It is an amenable number.

11231001121 is a deficient number, since it is larger than the sum of its proper divisors (25352591).

11231001121 is an equidigital number, since it uses as much as digits as its factorization.

11231001121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25352590.

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

Adding to 11231001121 its reverse (12110013211), we get a palindrome (23341014332).

The spelling of 11231001121 in words is "eleven billion, two hundred thirty-one million, one thousand, one hundred twenty-one".