121112211020 has 24 divisors (see below), whose sum is σ = 254349841200. Its totient is φ = 48442180032.

The previous prime is 121112211013. The next prime is 121112211023. The reversal of 121112211020 is 20112211121.

It is a junction number, because it is equal to n+sod(n) for n = 121112210986 and 121112211004.

It is not an unprimeable number, because it can be changed into a prime (121112211023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220046 + ... + 539114.

It is an arithmetic number, because the mean of its divisors is an integer number (10597910050).

Almost surely, 2^121112211020 is an apocalyptic number.

121112211020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121112211020 is an abundant number, since it is smaller than the sum of its proper divisors (133237630180).

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

121112211020 is a wasteful number, since it uses less digits than its factorization.

121112211020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338057 (or 338055 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121112211020 its reverse (20112211121), we get a palindrome (141224422141).

The spelling of 121112211020 in words is "one hundred twenty-one billion, one hundred twelve million, two hundred eleven thousand, twenty".