121261105 has 16 divisors (see below), whose sum is σ = 167952384. Its totient is φ = 82324800.

The previous prime is 121261087. The next prime is 121261109. The reversal of 121261105 is 501162121.

It is not a de Polignac number, because 121261105 - 2⁵ = 121261073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121261109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13617 + ... + 20686.

It is an arithmetic number, because the mean of its divisors is an integer number (10497024).

Almost surely, 2^121261105 is an apocalyptic number.

It is an amenable number.

121261105 is a deficient number, since it is larger than the sum of its proper divisors (46691279).

121261105 is a wasteful number, since it uses less digits than its factorization.

121261105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34416.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 121261105 is about 11011.8620133018. The cubic root of 121261105 is about 494.9642595696.

It can be divided in two parts, 12126 and 1105, that added together give a palindrome (13231).

The spelling of 121261105 in words is "one hundred twenty-one million, two hundred sixty-one thousand, one hundred five".