13121020211 has 4 divisors (see below), whose sum is σ = 14130329472. Its totient is φ = 12111710952.

The previous prime is 13121020183. The next prime is 13121020229. The reversal of 13121020211 is 11202012131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11202012131 = 2381 ⋅4704751.

It is a cyclic number.

It is not a de Polignac number, because 13121020211 - 2¹⁸ = 13120758067 is a prime.

It is a super-2 number, since 2×13121020211² (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 (13121020261) 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, 504654611 + ... + 504654636.

It is an arithmetic number, because the mean of its divisors is an integer number (3532582368).

Almost surely, 2^13121020211 is an apocalyptic number.

13121020211 is a deficient number, since it is larger than the sum of its proper divisors (1009309261).

13121020211 is a wasteful number, since it uses less digits than its factorization.

13121020211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009309260.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 13121020211 its reverse (11202012131), we get a palindrome (24323032342).

The spelling of 13121020211 in words is "thirteen billion, one hundred twenty-one million, twenty thousand, two hundred eleven".