121123211131 has 8 divisors (see below), whose sum is σ = 137305664720. Its totient is φ = 105921512352.

The previous prime is 121123211117. The next prime is 121123211147. The reversal of 121123211131 is 131112321121.

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 121123211131 - 2⁷ = 121123211003 is a prime.

It is a super-2 number, since 2×121123211131² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121123211099 and 121123211108.

It is not an unprimeable number, because it can be changed into a prime (121123211161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245188440 + ... + 245188933.

It is an arithmetic number, because the mean of its divisors is an integer number (17163208090).

Almost surely, 2^121123211131 is an apocalyptic number.

121123211131 is a deficient number, since it is larger than the sum of its proper divisors (16182453589).

121123211131 is a wasteful number, since it uses less digits than its factorization.

121123211131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490377405.

The product of its digits is 72, while the sum is 19.

Adding to 121123211131 its reverse (131112321121), we get a palindrome (252235532252).

The spelling of 121123211131 in words is "one hundred twenty-one billion, one hundred twenty-three million, two hundred eleven thousand, one hundred thirty-one".