211021121120113 has 4 divisors (see below), whose sum is σ = 211033466607348. Its totient is φ = 211008775632880.

The previous prime is 211021121120107. The next prime is 211021121120123. The reversal of 211021121120113 is 311021121120112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 148468571213824 + 62552549906289 = 12184768^2 + 7909017^2 .

It is a cyclic number.

It is not a de Polignac number, because 211021121120113 - 2²⁵ = 211021087565681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211021121120123) 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, 6172717978 + ... + 6172752163.

It is an arithmetic number, because the mean of its divisors is an integer number (52758366651837).

Almost surely, 2^{211021121120113} is an apocalyptic number.

It is an amenable number.

211021121120113 is a deficient number, since it is larger than the sum of its proper divisors (12345487235).

211021121120113 is a wasteful number, since it uses less digits than its factorization.

211021121120113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12345487234.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 211021121120113 its reverse (311021121120112), we get a palindrome (522042242240225).

Subtracting 211021121120113 from its reverse (311021121120112), we obtain a palindrome (99999999999999).

The spelling of 211021121120113 in words is "two hundred eleven trillion, twenty-one billion, one hundred twenty-one million, one hundred twenty thousand, one hundred thirteen".