2121111331013 has 4 divisors (see below), whose sum is σ = 2134124284128. Its totient is φ = 2108098377900.

The previous prime is 2121111330881. The next prime is 2121111331037. The reversal of 2121111331013 is 3101331111212.

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 2121111331013 - 2¹⁶ = 2121111265477 is a prime.

It is a super-2 number, since 2×2121111331013² (a number of 25 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 (2121111331093) 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, 6506476313 + ... + 6506476638.

It is an arithmetic number, because the mean of its divisors is an integer number (533531071032).

Almost surely, 2^{2121111331013} is an apocalyptic number.

It is an amenable number.

2121111331013 is a deficient number, since it is larger than the sum of its proper divisors (13012953115).

2121111331013 is a wasteful number, since it uses less digits than its factorization.

2121111331013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13012953114.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 2121111331013 its reverse (3101331111212), we get a palindrome (5222442442225).

The spelling of 2121111331013 in words is "two trillion, one hundred twenty-one billion, one hundred eleven million, three hundred thirty-one thousand, thirteen".