121905229 has 4 divisors (see below), whose sum is σ = 122054176. Its totient is φ = 121756284.

The previous prime is 121905167. The next prime is 121905233. The reversal of 121905229 is 922509121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121905229 - 2¹¹ = 121903181 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 121905229.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121905239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73239 + ... + 74884.

It is an arithmetic number, because the mean of its divisors is an integer number (30513544).

Almost surely, 2^121905229 is an apocalyptic number.

It is an amenable number.

121905229 is a deficient number, since it is larger than the sum of its proper divisors (148947).

121905229 is an equidigital number, since it uses as much as digits as its factorization.

121905229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148946.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 121905229 is about 11041.0701021233. The cubic root of 121905229 is about 495.8391086837.

The spelling of 121905229 in words is "one hundred twenty-one million, nine hundred five thousand, two hundred twenty-nine".