121206051 has 20 divisors (see below), whose sum is σ = 187308000. Its totient is φ = 78016176.

The previous prime is 121206037. The next prime is 121206077. The reversal of 121206051 is 150602121.

It is not a de Polignac number, because 121206051 - 2¹⁰ = 121205027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121206011) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 23451 + ... + 28148.

It is an arithmetic number, because the mean of its divisors is an integer number (9365400).

Almost surely, 2^121206051 is an apocalyptic number.

121206051 is a deficient number, since it is larger than the sum of its proper divisors (66101949).

121206051 is an equidigital number, since it uses as much as digits as its factorization.

121206051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51640 (or 51631 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 121206051 is about 11009.3619706139. The cubic root of 121206051 is about 494.8893416551.

Adding to 121206051 its reverse (150602121), we get a palindrome (271808172).

The spelling of 121206051 in words is "one hundred twenty-one million, two hundred six thousand, fifty-one".