121120028 has 12 divisors (see below), whose sum is σ = 212067240. Its totient is φ = 60529392.

The previous prime is 121120009. The next prime is 121120057. The reversal of 121120028 is 820021121.

It is a happy number.

It is a super-2 number, since 2×121120028² = 29340122365441568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121119988 and 121120015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2843 + ... + 15821.

It is an arithmetic number, because the mean of its divisors is an integer number (17672270).

Almost surely, 2^121120028 is an apocalyptic number.

It is an amenable number.

121120028 is a deficient number, since it is larger than the sum of its proper divisors (90947212).

121120028 is a wasteful number, since it uses less digits than its factorization.

121120028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15316 (or 15314 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 121120028 is about 11005.4544658546. The cubic root of 121120028 is about 494.7722354521.

Adding to 121120028 its reverse (820021121), we get a palindrome (941141149).

The spelling of 121120028 in words is "one hundred twenty-one million, one hundred twenty thousand, twenty-eight".