21112121113013 has 8 divisors (see below), whose sum is σ = 24128166201600. Its totient is φ = 18096082971120.

The previous prime is 21112121113001. The next prime is 21112121113037. The reversal of 21112121113013 is 31031112121112.

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

It is not a de Polignac number, because 21112121113013 - 2⁶ = 21112121112949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112121113813) 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, 11270948 + ... + 13009938.

It is an arithmetic number, because the mean of its divisors is an integer number (3016020775200).

Almost surely, 2^{21112121113013} is an apocalyptic number.

It is an amenable number.

21112121113013 is a deficient number, since it is larger than the sum of its proper divisors (3016045088587).

21112121113013 is a wasteful number, since it uses less digits than its factorization.

21112121113013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3473347.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 21112121113013 its reverse (31031112121112), we get a palindrome (52143233234125).

The spelling of 21112121113013 in words is "twenty-one trillion, one hundred twelve billion, one hundred twenty-one million, one hundred thirteen thousand, thirteen".