121227121 has 4 divisors (see below), whose sum is σ = 121309812. Its totient is φ = 121144432.

The previous prime is 121227107. The next prime is 121227131. The reversal of 121227121 is 121722121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 91470096 + 29757025 = 9564^2 + 5455^2 .

It is a cyclic number.

It is not a de Polignac number, because 121227121 - 2⁷ = 121226993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121227101) 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, 39106 + ... + 42091.

It is an arithmetic number, because the mean of its divisors is an integer number (30327453).

Almost surely, 2^121227121 is an apocalyptic number.

It is an amenable number.

121227121 is a deficient number, since it is larger than the sum of its proper divisors (82691).

121227121 is an equidigital number, since it uses as much as digits as its factorization.

121227121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82690.

The product of its digits is 112, while the sum is 19.

The square root of 121227121 is about 11010.3188418865. The cubic root of 121227121 is about 494.9180165554.

Adding to 121227121 its reverse (121722121), we get a palindrome (242949242).

The spelling of 121227121 in words is "one hundred twenty-one million, two hundred twenty-seven thousand, one hundred twenty-one".