211211121013 has 8 divisors (see below), whose sum is σ = 224563256280. Its totient is φ = 197962091520.

The previous prime is 211211120993. The next prime is 211211121019. The reversal of 211211121013 is 310121112112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 89342405604 + 121868715409 = 298902^2 + 349097^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211211121013 - 2⁹ = 211211120501 is a prime.

It is a super-2 number, since 2×211211121013² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211211121019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25772218 + ... + 25780411.

It is an arithmetic number, because the mean of its divisors is an integer number (28070407035).

Almost surely, 2^211211121013 is an apocalyptic number.

It is an amenable number.

211211121013 is a deficient number, since it is larger than the sum of its proper divisors (13352135267).

211211121013 is a wasteful number, since it uses less digits than its factorization.

211211121013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51552887.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 211211121013 its reverse (310121112112), we get a palindrome (521332233125).

The spelling of 211211121013 in words is "two hundred eleven billion, two hundred eleven million, one hundred twenty-one thousand, thirteen".