21211102111001 has 8 divisors (see below), whose sum is σ = 23139929100000. Its totient is φ = 19282365951840.

The previous prime is 21211102110973. The next prime is 21211102111027. The reversal of 21211102111001 is 10011120111212.

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 21211102111001 - 2³⁰ = 21210028369177 is a prime.

It is a super-2 number, since 2×21211102111001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21211102111051) 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, 22218716 + ... + 23153693.

It is an arithmetic number, because the mean of its divisors is an integer number (2892491137500).

Almost surely, 2^{21211102111001} is an apocalyptic number.

It is an amenable number.

21211102111001 is a deficient number, since it is larger than the sum of its proper divisors (1928826988999).

21211102111001 is a wasteful number, since it uses less digits than its factorization.

21211102111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45414919.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21211102111001 its reverse (10011120111212), we get a palindrome (31222222222213).

It can be divided in two parts, 2121110211 and 1001, that added together give a palindrome (2121111212).

The spelling of 21211102111001 in words is "twenty-one trillion, two hundred eleven billion, one hundred two million, one hundred eleven thousand, one".