211020213012013 has 4 divisors (see below), whose sum is σ = 223433166718620. Its totient is φ = 198607259305408.

The previous prime is 211020213011983. The next prime is 211020213012067. The reversal of 211020213012013 is 310210312020112.

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 190955170734409 + 20065042277604 = 13818653^2 + 4479402^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211020213012013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211020213012613) 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, 6206476853278 + ... + 6206476853311.

It is an arithmetic number, because the mean of its divisors is an integer number (55858291679655).

Almost surely, 2^{211020213012013} is an apocalyptic number.

It is an amenable number.

211020213012013 is a deficient number, since it is larger than the sum of its proper divisors (12412953706607).

211020213012013 is a wasteful number, since it uses less digits than its factorization.

211020213012013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12412953706606.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 211020213012013 its reverse (310210312020112), we get a palindrome (521230525032125).

The spelling of 211020213012013 in words is "two hundred eleven trillion, twenty billion, two hundred thirteen million, twelve thousand, thirteen".