121012655 has 8 divisors (see below), whose sum is σ = 145286784. Its totient is φ = 96762400.

The previous prime is 121012651. The next prime is 121012663. The reversal of 121012655 is 556210121.

It is a happy number.

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

It is not a de Polignac number, because 121012655 - 2² = 121012651 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 121012655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121012651) 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, 8285 + ... + 17625.

It is an arithmetic number, because the mean of its divisors is an integer number (18160848).

Almost surely, 2^121012655 is an apocalyptic number.

121012655 is a deficient number, since it is larger than the sum of its proper divisors (24274129).

121012655 is an equidigital number, since it uses as much as digits as its factorization.

121012655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11937.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 121012655 is about 11000.5752122332. The cubic root of 121012655 is about 494.6259869019.

Adding to 121012655 its reverse (556210121), we get a palindrome (677222776).

The spelling of 121012655 in words is "one hundred twenty-one million, twelve thousand, six hundred fifty-five".