121031105 has 8 divisors (see below), whose sum is σ = 156409512. Its totient is φ = 89376768.

The previous prime is 121031101. The next prime is 121031117. The reversal of 121031105 is 501130121.

It can be written as a sum of positive squares in 4 ways, for example, as 26863489 + 94167616 = 5183^2 + 9704^2 .

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

It is not a de Polignac number, because 121031105 - 2² = 121031101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121031105.

It is not an unprimeable number, because it can be changed into a prime (121031101) 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, 930944 + ... + 931073.

It is an arithmetic number, because the mean of its divisors is an integer number (19551189).

Almost surely, 2^121031105 is an apocalyptic number.

It is an amenable number.

121031105 is a deficient number, since it is larger than the sum of its proper divisors (35378407).

121031105 is a wasteful number, since it uses less digits than its factorization.

121031105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1862035.

The product of its (nonzero) digits is 30, while the sum is 14.

The square root of 121031105 is about 11001.4137727839. The cubic root of 121031105 is about 494.6511230766.

Adding to 121031105 its reverse (501130121), we get a palindrome (622161226).

The spelling of 121031105 in words is "one hundred twenty-one million, thirty-one thousand, one hundred five".