20121303011 has 4 divisors (see below), whose sum is σ = 20126941224. Its totient is φ = 20115664800.

The previous prime is 20121303001. The next prime is 20121303017. The reversal of 20121303011 is 11030312102.

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 20121303011 - 2¹⁰ = 20121301987 is a prime.

It is a super-2 number, since 2×20121303011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121303017) 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, 2813750 + ... + 2820891.

It is an arithmetic number, because the mean of its divisors is an integer number (5031735306).

Almost surely, 2^20121303011 is an apocalyptic number.

20121303011 is a deficient number, since it is larger than the sum of its proper divisors (5638213).

20121303011 is an equidigital number, since it uses as much as digits as its factorization.

20121303011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5638212.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 20121303011 its reverse (11030312102), we get a palindrome (31151615113).

Subtracting from 20121303011 its reverse (11030312102), we obtain a palindrome (9090990909).

The spelling of 20121303011 in words is "twenty billion, one hundred twenty-one million, three hundred three thousand, eleven".