12101121020 has 48 divisors (see below), whose sum is σ = 26050066560. Its totient is φ = 4719750144.

The previous prime is 12101121007. The next prime is 12101121047. The reversal of 12101121020 is 2012110121.

It is a junction number, because it is equal to n+sod(n) for n = 12101120992 and 12101121010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228932 + ... + 276788.

It is an arithmetic number, because the mean of its divisors is an integer number (542709720).

Almost surely, 2^12101121020 is an apocalyptic number.

12101121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12101121020 is an abundant number, since it is smaller than the sum of its proper divisors (13948945540).

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

12101121020 is a wasteful number, since it uses less digits than its factorization.

12101121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48182 (or 48180 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 12101121020 its reverse (2012110121), we get a palindrome (14113231141).

The spelling of 12101121020 in words is "twelve billion, one hundred one million, one hundred twenty-one thousand, twenty".