121045216 has 48 divisors (see below), whose sum is σ = 244944000. Its totient is φ = 58859008.

The previous prime is 121045193. The next prime is 121045229. The reversal of 121045216 is 612540121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252465 + ... + 252943.

It is an arithmetic number, because the mean of its divisors is an integer number (5103000).

Almost surely, 2^121045216 is an apocalyptic number.

121045216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121045216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122472000).

121045216 is an abundant number, since it is smaller than the sum of its proper divisors (123898784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121045216 is a wasteful number, since it uses less digits than its factorization.

121045216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691 (or 683 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 121045216 is about 11002.0550807565. The cubic root of 121045216 is about 494.6703460985.

Adding to 121045216 its reverse (612540121), we get a palindrome (733585337).

The spelling of 121045216 in words is "one hundred twenty-one million, forty-five thousand, two hundred sixteen".