11331022121 has 24 divisors (see below), whose sum is σ = 12350477376. Its totient is φ = 10389899520.

The previous prime is 11331022103. The next prime is 11331022127. The reversal of 11331022121 is 12122013311.

It is not a de Polignac number, because 11331022121 - 2¹⁸ = 11330759977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11331022121.

It is not an unprimeable number, because it can be changed into a prime (11331022127) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1883300 + ... + 1889306.

It is an arithmetic number, because the mean of its divisors is an integer number (514603224).

Almost surely, 2^11331022121 is an apocalyptic number.

It is an amenable number.

11331022121 is a deficient number, since it is larger than the sum of its proper divisors (1019455255).

11331022121 is a wasteful number, since it uses less digits than its factorization.

11331022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6209 (or 6192 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 11331022121 its reverse (12122013311), we get a palindrome (23453035432).

The spelling of 11331022121 in words is "eleven billion, three hundred thirty-one million, twenty-two thousand, one hundred twenty-one".