21112102121001 has 8 divisors (see below), whose sum is σ = 28626579147360. Its totient is φ = 13836179920992.

The previous prime is 21112102120979. The next prime is 21112102121017. The reversal of 21112102121001 is 10012120121112.

It is a happy number.

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

It is not a de Polignac number, because 21112102121001 - 2⁷ = 21112102120873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21112102121101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59638706380 + ... + 59638706733.

It is an arithmetic number, because the mean of its divisors is an integer number (3578322393420).

Almost surely, 2^{21112102121001} is an apocalyptic number.

It is an amenable number.

21112102121001 is a deficient number, since it is larger than the sum of its proper divisors (7514477026359).

21112102121001 is a wasteful number, since it uses less digits than its factorization.

21112102121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119277413175.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21112102121001 its reverse (10012120121112), we get a palindrome (31124222242113).

The spelling of 21112102121001 in words is "twenty-one trillion, one hundred twelve billion, one hundred two million, one hundred twenty-one thousand, one".