11012130121 has 4 divisors (see below), whose sum is σ = 11014848532. Its totient is φ = 11009411712.

The previous prime is 11012130083. The next prime is 11012130131. The reversal of 11012130121 is 12103121011.

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 5156819721 + 5855310400 = 71811^2 + 76520^2 .

It is a cyclic number.

It is not a de Polignac number, because 11012130121 - 2¹⁵ = 11012097353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11012130131) 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, 1353120 + ... + 1361233.

It is an arithmetic number, because the mean of its divisors is an integer number (2753712133).

Almost surely, 2^11012130121 is an apocalyptic number.

It is an amenable number.

11012130121 is a deficient number, since it is larger than the sum of its proper divisors (2718411).

11012130121 is an equidigital number, since it uses as much as digits as its factorization.

11012130121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2718410.

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

Adding to 11012130121 its reverse (12103121011), we get a palindrome (23115251132).

The spelling of 11012130121 in words is "eleven billion, twelve million, one hundred thirty thousand, one hundred twenty-one".