912210121 has 8 divisors (see below), whose sum is σ = 961852320. Its totient is φ = 862731072.

The previous prime is 912210113. The next prime is 912210137. The reversal of 912210121 is 121012219.

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 912210121 - 2³ = 912210113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (912210161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29215 + ... + 51748.

It is an arithmetic number, because the mean of its divisors is an integer number (120231540).

Almost surely, 2^912210121 is an apocalyptic number.

It is an amenable number.

912210121 is a deficient number, since it is larger than the sum of its proper divisors (49642199).

912210121 is a wasteful number, since it uses less digits than its factorization.

912210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81575.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 912210121 is about 30202.8164415175. The cubic root of 912210121 is about 969.8359877867.

The spelling of 912210121 in words is "nine hundred twelve million, two hundred ten thousand, one hundred twenty-one".