121130028 has 18 divisors (see below), whose sum is σ = 306189884. Its totient is φ = 40376664.

The previous prime is 121130003. The next prime is 121130033. The reversal of 121130028 is 820031121.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1682326 + ... + 1682397.

Almost surely, 2^121130028 is an apocalyptic number.

121130028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

121130028 is an abundant number, since it is smaller than the sum of its proper divisors (185059856).

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

121130028 is a wasteful number, since it uses less digits than its factorization.

121130028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3364733 (or 3364728 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 121130028 is about 11005.9087766527. The cubic root of 121130028 is about 494.7858516593.

Adding to 121130028 its reverse (820031121), we get a palindrome (941161149).

The spelling of 121130028 in words is "one hundred twenty-one million, one hundred thirty thousand, twenty-eight".