10201113121 has 4 divisors (see below), whose sum is σ = 10257473044. Its totient is φ = 10144753200.

The previous prime is 10201113113. The next prime is 10201113179. The reversal of 10201113121 is 12131110201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 623750625 + 9577362496 = 24975^2 + 97864^2 .

It is a cyclic number.

It is not a de Polignac number, because 10201113121 - 2³ = 10201113113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10201111121) 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, 28179690 + ... + 28180051.

It is an arithmetic number, because the mean of its divisors is an integer number (2564368261).

Almost surely, 2^10201113121 is an apocalyptic number.

It is an amenable number.

10201113121 is a deficient number, since it is larger than the sum of its proper divisors (56359923).

10201113121 is an equidigital number, since it uses as much as digits as its factorization.

10201113121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56359922.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 10201113121 its reverse (12131110201), we get a palindrome (22332223322).

The spelling of 10201113121 in words is "ten billion, two hundred one million, one hundred thirteen thousand, one hundred twenty-one".