21112101212001 has 8 divisors (see below), whose sum is σ = 29120139602880. Its totient is φ = 13589398481232.

The previous prime is 21112101211991. The next prime is 21112101212051. The reversal of 21112101212001 is 10021210121112.

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 21112101212001 - 2⁹ = 21112101211489 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21112101212051) 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, 121333914925 + ... + 121333915098.

It is an arithmetic number, because the mean of its divisors is an integer number (3640017450360).

Almost surely, 2^{21112101212001} is an apocalyptic number.

It is an amenable number.

21112101212001 is a deficient number, since it is larger than the sum of its proper divisors (8008038390879).

21112101212001 is a wasteful number, since it uses less digits than its factorization.

21112101212001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242667830055.

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

Adding to 21112101212001 its reverse (10021210121112), we get a palindrome (31133311333113).

The spelling of 21112101212001 in words is "twenty-one trillion, one hundred twelve billion, one hundred one million, two hundred twelve thousand, one".