10121121021 has 32 divisors (see below), whose sum is σ = 14833681920. Its totient is φ = 6087441600.

The previous prime is 10121120993. The next prime is 10121121061. The reversal of 10121121021 is 12012112101.

10121121021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10121121021 - 2¹⁵ = 10121088253 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10121120988 and 10121121006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10121121061) 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 31 ways as a sum of consecutive naturals, for example, 6610026 + ... + 6611556.

It is an arithmetic number, because the mean of its divisors is an integer number (463552560).

Almost surely, 2^10121121021 is an apocalyptic number.

10121121021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10121121021 is a deficient number, since it is larger than the sum of its proper divisors (4712560899).

10121121021 is a wasteful number, since it uses less digits than its factorization.

10121121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2937.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 10121121021 its reverse (12012112101), we get a palindrome (22133233122).

The spelling of 10121121021 in words is "ten billion, one hundred twenty-one million, one hundred twenty-one thousand, twenty-one".