121227128 has 32 divisors (see below), whose sum is σ = 248400000. Its totient is φ = 55006560.

The previous prime is 121227107. The next prime is 121227131. The reversal of 121227128 is 821722121.

It is a junction number, because it is equal to n+sod(n) for n = 121227097 and 121227106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80123 + ... + 81621.

It is an arithmetic number, because the mean of its divisors is an integer number (7762500).

Almost surely, 2^121227128 is an apocalyptic number.

It is an amenable number.

121227128 is an abundant number, since it is smaller than the sum of its proper divisors (127172872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121227128 is a wasteful number, since it uses less digits than its factorization.

121227128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2435 (or 2431 counting only the distinct ones).

The product of its digits is 896, while the sum is 26.

The square root of 121227128 is about 11010.3191597701. The cubic root of 121227128 is about 494.9180260814.

Adding to 121227128 its reverse (821722121), we get a palindrome (942949249).

The spelling of 121227128 in words is "one hundred twenty-one million, two hundred twenty-seven thousand, one hundred twenty-eight".