10121212100020 has 36 divisors (see below), whose sum is σ = 24724675275300. Its totient is φ = 3470129862528.

The previous prime is 10121212100009. The next prime is 10121212100059. The reversal of 10121212100020 is 2000121212101.

It can be written as a sum of positive squares in 2 ways, for example, as 6575470375824 + 3545741724196 = 2564268^2 + 1883014^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5163882745 + ... + 5163884704.

It is an arithmetic number, because the mean of its divisors is an integer number (686796535425).

Almost surely, 2^{10121212100020} is an apocalyptic number.

10121212100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10121212100020 is an abundant number, since it is smaller than the sum of its proper divisors (14603463175280).

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

10121212100020 is a wasteful number, since it uses less digits than its factorization.

10121212100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10327767472 (or 10327767463 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 10121212100020 its reverse (2000121212101), we get a palindrome (12121333312121).

The spelling of 10121212100020 in words is "ten trillion, one hundred twenty-one billion, two hundred twelve million, one hundred thousand, twenty".