21122011112201 has 8 divisors (see below), whose sum is σ = 22234067011680. Its totient is φ = 20009992323168.

The previous prime is 21122011112173. The next prime is 21122011112227. The reversal of 21122011112201 is 10221111022112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21122011112201 is a prime.

It is a super-2 number, since 2×21122011112201² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21122011112201.

It is not an unprimeable number, because it can be changed into a prime (21122011112291) 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, 8105516 + ... + 10389581.

It is an arithmetic number, because the mean of its divisors is an integer number (2779258376460).

Almost surely, 2^{21122011112201} is an apocalyptic number.

It is an amenable number.

21122011112201 is a deficient number, since it is larger than the sum of its proper divisors (1112055899479).

21122011112201 is a wasteful number, since it uses less digits than its factorization.

21122011112201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18555223.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21122011112201 its reverse (10221111022112), we get a palindrome (31343122134313).

The spelling of 21122011112201 in words is "twenty-one trillion, one hundred twenty-two billion, eleven million, one hundred twelve thousand, two hundred one".