121235212055 has 8 divisors (see below), whose sum is σ = 146841902352. Its totient is φ = 96081737728.

The previous prime is 121235212051. The next prime is 121235212069. The reversal of 121235212055 is 550212532121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 121235212055 - 2² = 121235212051 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121235212051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113303402 + ... + 113304471.

It is an arithmetic number, because the mean of its divisors is an integer number (18355237794).

Almost surely, 2^121235212055 is an apocalyptic number.

121235212055 is a deficient number, since it is larger than the sum of its proper divisors (25606690297).

121235212055 is a wasteful number, since it uses less digits than its factorization.

121235212055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226607985.

The product of its (nonzero) digits is 6000, while the sum is 29.

Adding to 121235212055 its reverse (550212532121), we get a palindrome (671447744176).

The spelling of 121235212055 in words is "one hundred twenty-one billion, two hundred thirty-five million, two hundred twelve thousand, fifty-five".