12101122121020 has 24 divisors (see below), whose sum is σ = 25413389211168. Its totient is φ = 4840252132800.

The previous prime is 12101122120957. The next prime is 12101122121021. The reversal of 12101122121020 is 2012122110121.

It is a junction number, because it is equal to n+sod(n) for n = 12101122120985 and 12101122121003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101122121021) 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, 11789791 + ... + 12775030.

It is an arithmetic number, because the mean of its divisors is an integer number (1058891217132).

Almost surely, 2^{12101122121020} is an apocalyptic number.

12101122121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12101122121020 is an abundant number, since it is smaller than the sum of its proper divisors (13312267090148).

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

12101122121020 is a wasteful number, since it uses less digits than its factorization.

12101122121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24589461 (or 24589459 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12101122121020 its reverse (2012122110121), we get a palindrome (14113244231141).

The spelling of 12101122121020 in words is "twelve trillion, one hundred one billion, one hundred twenty-two million, one hundred twenty-one thousand, twenty".