121228569 has 144 divisors (see below), whose sum is σ = 247869440. Its totient is φ = 57736800.

The previous prime is 121228559. The next prime is 121228571. The reversal of 121228569 is 965822121.

It is not a de Polignac number, because 121228569 - 2⁴ = 121228553 is a prime.

It is a super-2 number, since 2×121228569² = 29392731883575522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121228519) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 3910584 + ... + 3910614.

Almost surely, 2^121228569 is an apocalyptic number.

121228569 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

121228569 is an abundant number, since it is smaller than the sum of its proper divisors (126640871).

121228569 is a wasteful number, since it uses less digits than its factorization.

121228569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94 (or 71 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 121228569 is about 11010.3845981873. The cubic root of 121228569 is about 494.9199870672.

The spelling of 121228569 in words is "one hundred twenty-one million, two hundred twenty-eight thousand, five hundred sixty-nine".