121020 has 24 divisors (see below), whose sum is σ = 339024. Its totient is φ = 32256.

The previous prime is 121019. The next prime is 121021. The reversal of 121020 is 20121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121019) and next prime (121021).

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121021) 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, 949 + ... + 1068.

It is an arithmetic number, because the mean of its divisors is an integer number (14126).

2¹²¹⁰²⁰ is an apocalyptic number.

121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121020 is an abundant number, since it is smaller than the sum of its proper divisors (218004).

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

121020 is a wasteful number, since it uses less digits than its factorization.

121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2029 (or 2027 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 121020 is about 347.8792894094. The cubic root of 121020 is about 49.4635993994.

Adding to 121020 its reverse (20121), we get a palindrome (141141).

The spelling of 121020 in words is "one hundred twenty-one thousand, twenty", and thus it is an iban number.