20121121334411 has 4 divisors (see below), whose sum is σ = 20147701416192. Its totient is φ = 20094541252632.

The previous prime is 20121121334407. The next prime is 20121121334453. The reversal of 20121121334411 is 11443312112102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20121121334411 - 2² = 20121121334407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121121324411) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 13290039755 + ... + 13290041268.

It is an arithmetic number, because the mean of its divisors is an integer number (5036925354048).

Almost surely, 2^{20121121334411} is an apocalyptic number.

20121121334411 is a deficient number, since it is larger than the sum of its proper divisors (26580081781).

20121121334411 is an equidigital number, since it uses as much as digits as its factorization.

20121121334411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26580081780.

The product of its (nonzero) digits is 1152, while the sum is 26.

Adding to 20121121334411 its reverse (11443312112102), we get a palindrome (31564433446513).

The spelling of 20121121334411 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty-one million, three hundred thirty-four thousand, four hundred eleven".