21112220021001 has 16 divisors (see below), whose sum is σ = 29827947988224. Its totient is φ = 13236900528384.

The previous prime is 21112220020981. The next prime is 21112220021159. The reversal of 21112220021001 is 10012002221112.

It is not a de Polignac number, because 21112220021001 - 2⁷ = 21112220020873 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21112220022001) 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 15 ways as a sum of consecutive naturals, for example, 155910130 + ... + 156045483.

It is an arithmetic number, because the mean of its divisors is an integer number (1864246749264).

Almost surely, 2^{21112220021001} is an apocalyptic number.

It is an amenable number.

21112220021001 is a deficient number, since it is larger than the sum of its proper divisors (8715727967223).

21112220021001 is a wasteful number, since it uses less digits than its factorization.

21112220021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311956960.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21112220021001 its reverse (10012002221112), we get a palindrome (31124222242113).

The spelling of 21112220021001 in words is "twenty-one trillion, one hundred twelve billion, two hundred twenty million, twenty-one thousand, one".