121042020 has 48 divisors (see below), whose sum is σ = 369730368. Its totient is φ = 29343360.

The previous prime is 121042013. The next prime is 121042021. The reversal of 121042020 is 20240121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 121041987 and 121042005.

It is not an unprimeable number, because it can be changed into a prime (121042021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91039 + ... + 92358.

It is an arithmetic number, because the mean of its divisors is an integer number (7702716).

Almost surely, 2^121042020 is an apocalyptic number.

121042020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121042020 is an abundant number, since it is smaller than the sum of its proper divisors (248688348).

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

121042020 is a wasteful number, since it uses less digits than its factorization.

121042020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183420 (or 183418 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 121042020 is about 11001.9098342061. The cubic root of 121042020 is about 494.6659924077.

Adding to 121042020 its reverse (20240121), we get a palindrome (141282141).

The spelling of 121042020 in words is "one hundred twenty-one million, forty-two thousand, twenty".