121016628 has 36 divisors (see below), whose sum is σ = 306237568. Its totient is φ = 40294800.

The previous prime is 121016617. The next prime is 121016629. The reversal of 121016628 is 826610121.

121016628 is a `hidden beast` number, since 1 + 21 + 0 + 16 + 628 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121016629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61053 + ... + 63003.

Almost surely, 2^121016628 is an apocalyptic number.

121016628 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

121016628 is an abundant number, since it is smaller than the sum of its proper divisors (185220940).

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

121016628 is a wasteful number, since it uses less digits than its factorization.

121016628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3684 (or 3679 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 121016628 is about 11000.7557922172. The cubic root of 121016628 is about 494.6313999103.

Adding to 121016628 its reverse (826610121), we get a palindrome (947626749).

The spelling of 121016628 in words is "one hundred twenty-one million, sixteen thousand, six hundred twenty-eight".