11331123212121 has 8 divisors (see below), whose sum is σ = 15112293339360. Its totient is φ = 7552017613152.

The previous prime is 11331123212113. The next prime is 11331123212131. The reversal of 11331123212121 is 12121232113311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11331123212121 - 2³ = 11331123212113 is a prime.

It is a super-3 number, since 3×11331123212121³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 11331123212091 and 11331123212100.

It is not an unprimeable number, because it can be changed into a prime (11331123212131) 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, 516119260 + ... + 516141213.

It is an arithmetic number, because the mean of its divisors is an integer number (1889036667420).

Almost surely, 2^{11331123212121} is an apocalyptic number.

It is an amenable number.

11331123212121 is a deficient number, since it is larger than the sum of its proper divisors (3781170127239).

11331123212121 is a wasteful number, since it uses less digits than its factorization.

11331123212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032264135.

The product of its digits is 432, while the sum is 24.

Adding to 11331123212121 its reverse (12121232113311), we get a palindrome (23452355325432).

The spelling of 11331123212121 in words is "eleven trillion, three hundred thirty-one billion, one hundred twenty-three million, two hundred twelve thousand, one hundred twenty-one".