12311121210020 has 24 divisors (see below), whose sum is σ = 25853754402168. Its totient is φ = 4924372320000.

The previous prime is 12311121210001. The next prime is 12311121210127. The reversal of 12311121210020 is 2001212111321.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4023297825856 + 8287823384164 = 2005816^2 + 2878858^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3425681 + ... + 6029720.

It is an arithmetic number, because the mean of its divisors is an integer number (1077239766757).

Almost surely, 2^{12311121210020} is an apocalyptic number.

12311121210020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12311121210020 is an abundant number, since it is smaller than the sum of its proper divisors (13542633192148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12311121210020 is a wasteful number, since it uses less digits than its factorization.

12311121210020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9520511 (or 9520509 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 12311121210020 its reverse (2001212111321), we get a palindrome (14312333321341).

The spelling of 12311121210020 in words is "twelve trillion, three hundred eleven billion, one hundred twenty-one million, two hundred ten thousand, twenty".