10000121020 has 12 divisors (see below), whose sum is σ = 21000254184. Its totient is φ = 4000048400.

The previous prime is 10000121009. The next prime is 10000121029. The reversal of 10000121020 is 2012100001.

10000121020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 10000120994 and 10000121012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10000121029) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 250003006 + ... + 250003045.

It is an arithmetic number, because the mean of its divisors is an integer number (1750021182).

Almost surely, 2^10000121020 is an apocalyptic number.

10000121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10000121020 is an abundant number, since it is smaller than the sum of its proper divisors (11000133164).

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

10000121020 is a wasteful number, since it uses less digits than its factorization.

10000121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500006060 (or 500006058 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 10000121020 its reverse (2012100001), we get a palindrome (12012221021).

The spelling of 10000121020 in words is "ten billion, one hundred twenty-one thousand, twenty".