121643051 has 4 divisors (see below), whose sum is σ = 121700472. Its totient is φ = 121585632.

The previous prime is 121643029. The next prime is 121643069. The reversal of 121643051 is 150346121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121643051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121643651) 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, 25406 + ... + 29811.

It is an arithmetic number, because the mean of its divisors is an integer number (30425118).

Almost surely, 2^121643051 is an apocalyptic number.

121643051 is a deficient number, since it is larger than the sum of its proper divisors (57421).

121643051 is an equidigital number, since it uses as much as digits as its factorization.

121643051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57420.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 121643051 is about 11029.1908588074. The cubic root of 121643051 is about 495.4833913427.

Adding to 121643051 its reverse (150346121), we get a palindrome (271989172).

The spelling of 121643051 in words is "one hundred twenty-one million, six hundred forty-three thousand, fifty-one".