121311020 has 24 divisors (see below), whose sum is σ = 254961168. Its totient is φ = 48484800.

The previous prime is 121311019. The next prime is 121311053. The reversal of 121311020 is 20113121.

It is a junction number, because it is equal to n+sod(n) for n = 121310992 and 121311010.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43055 + ... + 45785.

It is an arithmetic number, because the mean of its divisors is an integer number (10623382).

Almost surely, 2^121311020 is an apocalyptic number.

121311020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121311020 is an abundant number, since it is smaller than the sum of its proper divisors (133650148).

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

121311020 is a wasteful number, since it uses less digits than its factorization.

121311020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4961 (or 4959 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 121311020 is about 11014.1281997260. The cubic root of 121311020 is about 495.0321646956.

Adding to 121311020 its reverse (20113121), we get a palindrome (141424141).

The spelling of 121311020 in words is "one hundred twenty-one million, three hundred eleven thousand, twenty".