121220051 has 8 divisors (see below), whose sum is σ = 126766080. Its totient is φ = 115697032.

The previous prime is 121220041. The next prime is 121220069. The reversal of 121220051 is 150022121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121220051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121220041) 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, 5516 + ... + 16518.

It is an arithmetic number, because the mean of its divisors is an integer number (15845760).

Almost surely, 2^121220051 is an apocalyptic number.

121220051 is a deficient number, since it is larger than the sum of its proper divisors (5546029).

121220051 is a wasteful number, since it uses less digits than its factorization.

121220051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11505.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 121220051 is about 11009.9977747500. The cubic root of 121220051 is about 494.9083951154.

Adding to 121220051 its reverse (150022121), we get a palindrome (271242172).

The spelling of 121220051 in words is "one hundred twenty-one million, two hundred twenty thousand, fifty-one".