10121200021020 has 192 divisors, whose sum is σ = 31449234120192. Its totient is φ = 2411346048000.

The previous prime is 10121200021019. The next prime is 10121200021117. The reversal of 10121200021020 is 2012000212101.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 10121200020987 and 10121200021005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 47440627 + ... + 47653493.

It is an arithmetic number, because the mean of its divisors is an integer number (163798094376).

Almost surely, 2^{10121200021020} is an apocalyptic number.

10121200021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10121200021020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15724617060096).

10121200021020 is an abundant number, since it is smaller than the sum of its proper divisors (21328034099172).

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

10121200021020 is a wasteful number, since it uses less digits than its factorization.

10121200021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214132 (or 214130 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 10121200021020 its reverse (2012000212101), we get a palindrome (12133200233121).

The spelling of 10121200021020 in words is "ten trillion, one hundred twenty-one billion, two hundred million, twenty-one thousand, twenty".