10201121222021 has 4 divisors (see below), whose sum is σ = 10201127632044. Its totient is φ = 10201114812000.

The previous prime is 10201121221943. The next prime is 10201121222087. The reversal of 10201121222021 is 12022212110201.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 9042830836900 + 1158290385121 = 3007130^2 + 1076239^2 .

It is a cyclic number.

It is not a de Polignac number, because 10201121222021 - 2¹⁸ = 10201120959877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10201121222521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1202891 + ... + 4674311.

It is an arithmetic number, because the mean of its divisors is an integer number (2550281908011).

Almost surely, 2^{10201121222021} is an apocalyptic number.

It is an amenable number.

10201121222021 is a deficient number, since it is larger than the sum of its proper divisors (6410023).

10201121222021 is an equidigital number, since it uses as much as digits as its factorization.

10201121222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6410022.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 10201121222021 its reverse (12022212110201), we get a palindrome (22223333332222).

The spelling of 10201121222021 in words is "ten trillion, two hundred one billion, one hundred twenty-one million, two hundred twenty-two thousand, twenty-one".