121231121121 has 32 divisors (see below), whose sum is σ = 197338713600. Its totient is φ = 72944796240.

The previous prime is 121231121117. The next prime is 121231121171. The reversal of 121231121121 is 121121132121.

It is a happy number.

121231121121 is a `hidden beast` number, since 1 + 212 + 311 + 21 + 121 = 666.

It is not a de Polignac number, because 121231121121 - 2² = 121231121117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121231121094 and 121231121103.

It is not an unprimeable number, because it can be changed into a prime (121231121171) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1427011 + ... + 1509576.

It is an arithmetic number, because the mean of its divisors is an integer number (6166834800).

Almost surely, 2^121231121121 is an apocalyptic number.

121231121121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121231121121 is a deficient number, since it is larger than the sum of its proper divisors (76107592479).

121231121121 is a wasteful number, since it uses less digits than its factorization.

121231121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2936746 (or 2936740 counting only the distinct ones).

The product of its digits is 48, while the sum is 18.

Adding to 121231121121 its reverse (121121132121), we get a palindrome (242352253242).

The spelling of 121231121121 in words is "one hundred twenty-one billion, two hundred thirty-one million, one hundred twenty-one thousand, one hundred twenty-one".