121177216 has 16 divisors (see below), whose sum is σ = 241407990. Its totient is φ = 60588544.

The previous prime is 121177213. The next prime is 121177223. The reversal of 121177216 is 612771121.

It can be written as a sum of positive squares in only one way, i.e., 82737216 + 38440000 = 9096^2 + 6200^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (121177211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 473221 + ... + 473476.

Almost surely, 2^121177216 is an apocalyptic number.

121177216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121177216 is a deficient number, since it is larger than the sum of its proper divisors (120230774).

121177216 is an frugal number, since it uses more digits than its factorization.

121177216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946711 (or 946699 counting only the distinct ones).

The product of its digits is 1176, while the sum is 28.

The square root of 121177216 is about 11008.0523254570. The cubic root of 121177216 is about 494.8500937083.

The spelling of 121177216 in words is "one hundred twenty-one million, one hundred seventy-seven thousand, two hundred sixteen".