121130020 has 48 divisors (see below), whose sum is σ = 286465536. Its totient is φ = 42624000.

The previous prime is 121130003. The next prime is 121130033. The reversal of 121130020 is 20031121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 121129979 and 121130006.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2061 + ... + 15700.

It is an arithmetic number, because the mean of its divisors is an integer number (5968032).

Almost surely, 2^121130020 is an apocalyptic number.

121130020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121130020 is an abundant number, since it is smaller than the sum of its proper divisors (165335516).

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

121130020 is a wasteful number, since it uses less digits than its factorization.

121130020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17812 (or 17810 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 121130020 is about 11005.9084132115. The cubic root of 121130020 is about 494.7858407666.

Adding to 121130020 its reverse (20031121), we get a palindrome (141161141).

The spelling of 121130020 in words is "one hundred twenty-one million, one hundred thirty thousand, twenty".