11212310031121 has 4 divisors (see below), whose sum is σ = 11213565758500. Its totient is φ = 11211054303744.

The previous prime is 11212310031119. The next prime is 11212310031149. The reversal of 11212310031121 is 12113001321211.

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 1517057792721 + 9695252238400 = 1231689^2 + 3113720^2 .

It is a cyclic number.

It is not a de Polignac number, because 11212310031121 - 2¹ = 11212310031119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11212310031161) 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, 627850296 + ... + 627868153.

It is an arithmetic number, because the mean of its divisors is an integer number (2803391439625).

Almost surely, 2^{11212310031121} is an apocalyptic number.

It is an amenable number.

11212310031121 is a deficient number, since it is larger than the sum of its proper divisors (1255727379).

11212310031121 is an equidigital number, since it uses as much as digits as its factorization.

11212310031121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255727378.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 11212310031121 its reverse (12113001321211), we get a palindrome (23325311352332).

The spelling of 11212310031121 in words is "eleven trillion, two hundred twelve billion, three hundred ten million, thirty-one thousand, one hundred twenty-one".