121131020 has 24 divisors (see below), whose sum is σ = 254608704. Its totient is φ = 48407936.

The previous prime is 121131019. The next prime is 121131037. The reversal of 121131020 is 20131121.

It is a junction number, because it is equal to n+sod(n) for n = 121130992 and 121131010.

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, 27704 + ... + 31776.

It is an arithmetic number, because the mean of its divisors is an integer number (10608696).

Almost surely, 2^121131020 is an apocalyptic number.

121131020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121131020 is an abundant number, since it is smaller than the sum of its proper divisors (133477684).

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

121131020 is a wasteful number, since it uses less digits than its factorization.

121131020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5569 (or 5567 counting only the distinct ones).

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

The square root of 121131020 is about 11005.9538432614. The cubic root of 121131020 is about 494.7872023462.

Adding to 121131020 its reverse (20131121), we get a palindrome (141262141).

The spelling of 121131020 in words is "one hundred twenty-one million, one hundred thirty-one thousand, twenty".