121112020 has 24 divisors (see below), whose sum is σ = 265394304. Its totient is φ = 46338336.

The previous prime is 121112011. The next prime is 121112027. The reversal of 121112020 is 20211121.

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 = 121111988 and 121112006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121112027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131184 + ... + 132103.

It is an arithmetic number, because the mean of its divisors is an integer number (11058096).

Almost surely, 2^121112020 is an apocalyptic number.

121112020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121112020 is an abundant number, since it is smaller than the sum of its proper divisors (144282284).

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

121112020 is a wasteful number, since it uses less digits than its factorization.

121112020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263319 (or 263317 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 121112020 is about 11005.0906402446. The cubic root of 121112020 is about 494.7613310529.

Adding to 121112020 its reverse (20211121), we get a palindrome (141323141).

It can be divided in two parts, 1211 and 12020, that added together give a palindrome (13231).

The spelling of 121112020 in words is "one hundred twenty-one million, one hundred twelve thousand, twenty".