21112220011001 has 8 divisors (see below), whose sum is σ = 24151883429184. Its totient is φ = 18078464589840.

The previous prime is 21112220010967. The next prime is 21112220011063. The reversal of 21112220011001 is 10011002221112.

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

It is a cyclic number.

It is not a de Polignac number, because 21112220011001 - 2¹⁰ = 21112220009977 is a prime.

It is a super-2 number, since 2×21112220011001² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21112220011501) 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, 1476991595 + ... + 1477005888.

It is an arithmetic number, because the mean of its divisors is an integer number (3018985428648).

Almost surely, 2^{21112220011001} is an apocalyptic number.

It is an amenable number.

21112220011001 is a deficient number, since it is larger than the sum of its proper divisors (3039663418183).

21112220011001 is a wasteful number, since it uses less digits than its factorization.

21112220011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2953998511.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21112220011001 its reverse (10011002221112), we get a palindrome (31123222232113).

The spelling of 21112220011001 in words is "twenty-one trillion, one hundred twelve billion, two hundred twenty million, eleven thousand, one".