211020120013 has 4 divisors (see below), whose sum is σ = 211348301248. Its totient is φ = 210691938780.

The previous prime is 211020120007. The next prime is 211020120043. The reversal of 211020120013 is 310021020112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211020120013 - 2²⁹ = 210483249101 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211020119975 and 211020120002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211020120043) 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, 164089653 + ... + 164090938.

It is an arithmetic number, because the mean of its divisors is an integer number (52837075312).

Almost surely, 2^211020120013 is an apocalyptic number.

It is an amenable number.

211020120013 is a deficient number, since it is larger than the sum of its proper divisors (328181235).

211020120013 is an equidigital number, since it uses as much as digits as its factorization.

211020120013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328181234.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 211020120013 its reverse (310021020112), we get a palindrome (521041140125).

Subtracting 211020120013 from its reverse (310021020112), we obtain a palindrome (99000900099).

The spelling of 211020120013 in words is "two hundred eleven billion, twenty million, one hundred twenty thousand, thirteen".