10202121121021 has 8 divisors (see below), whose sum is σ = 10279456830720. Its totient is φ = 10125037731072.

The previous prime is 10202121121007. The next prime is 10202121121033. The reversal of 10202121121021 is 12012112120201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10202121121021 - 2³⁹ = 9652365307133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10202121120986 and 10202121121004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10202121121001) 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, 62998765 + ... + 63160498.

It is an arithmetic number, because the mean of its divisors is an integer number (1284932103840).

Almost surely, 2^{10202121121021} is an apocalyptic number.

It is an amenable number.

10202121121021 is a deficient number, since it is larger than the sum of its proper divisors (77335709699).

10202121121021 is a wasteful number, since it uses less digits than its factorization.

10202121121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126159875.

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

Adding to 10202121121021 its reverse (12012112120201), we get a palindrome (22214233241222).

The spelling of 10202121121021 in words is "ten trillion, two hundred two billion, one hundred twenty-one million, one hundred twenty-one thousand, twenty-one".