121331105 has 32 divisors (see below), whose sum is σ = 171072000. Its totient is φ = 82574016.

The previous prime is 121331069. The next prime is 121331107. The reversal of 121331105 is 501133121.

It is not a de Polignac number, because 121331105 - 2²⁰ = 120282529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121331107) 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, 450911 + ... + 451179.

It is an arithmetic number, because the mean of its divisors is an integer number (5346000).

Almost surely, 2^121331105 is an apocalyptic number.

It is an amenable number.

121331105 is a deficient number, since it is larger than the sum of its proper divisors (49740895).

121331105 is an equidigital number, since it uses as much as digits as its factorization.

121331105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558 (or 544 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 121331105 is about 11015.0399454564. The cubic root of 121331105 is about 495.0594833799.

Adding to 121331105 its reverse (501133121), we get a palindrome (622464226).

The spelling of 121331105 in words is "one hundred twenty-one million, three hundred thirty-one thousand, one hundred five".