10202201021021 has 6 divisors (see below), whose sum is σ = 10224094274430. Its totient is φ = 10180354548536.

The previous prime is 10202201021009. The next prime is 10202201021029. The reversal of 10202201021021 is 12012010220201.

It can be written as a sum of positive squares in only one way, i.e., 8003727595396 + 2198473425625 = 2829086^2 + 1482725^2 .

It is a de Polignac number, because none of the positive numbers 2^k-10202201021021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10202201020987 and 10202201021005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10202201021029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23171906 + ... + 23608083.

It is an arithmetic number, because the mean of its divisors is an integer number (1704015712405).

Almost surely, 2^{10202201021021} is an apocalyptic number.

It is an amenable number.

10202201021021 is a deficient number, since it is larger than the sum of its proper divisors (21893253409).

10202201021021 is an frugal number, since it uses more digits than its factorization.

10202201021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46780923 (or 46780456 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 10202201021021 its reverse (12012010220201), we get a palindrome (22214211241222).

The spelling of 10202201021021 in words is "ten trillion, two hundred two billion, two hundred one million, twenty-one thousand, twenty-one".