10201023121 has 4 divisors (see below), whose sum is σ = 10214428644. Its totient is φ = 10187617600.

The previous prime is 10201023109. The next prime is 10201023127. The reversal of 10201023121 is 12132010201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12132010201 = 16481 ⋅736121.

It can be written as a sum of positive squares in 2 ways, for example, as 4373838225 + 5827184896 = 66135^2 + 76336^2 .

It is a cyclic number.

It is not a de Polignac number, because 10201023121 - 2²³ = 10192634513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10201023127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6701620 + ... + 6703141.

It is an arithmetic number, because the mean of its divisors is an integer number (2553607161).

Almost surely, 2^10201023121 is an apocalyptic number.

It is an amenable number.

10201023121 is a deficient number, since it is larger than the sum of its proper divisors (13405523).

10201023121 is an equidigital number, since it uses as much as digits as its factorization.

10201023121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13405522.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 10201023121 its reverse (12132010201), we get a palindrome (22333033322).

The spelling of 10201023121 in words is "ten billion, two hundred one million, twenty-three thousand, one hundred twenty-one".