21002211122011 has 8 divisors (see below), whose sum is σ = 24291714069504. Its totient is φ = 17785004942760.

The previous prime is 21002211121961. The next prime is 21002211122029. The reversal of 21002211122011 is 11022111220012.

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 21002211122011 - 2³¹ = 21000063638363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21002211122111) 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, 18074191435 + ... + 18074192596.

It is an arithmetic number, because the mean of its divisors is an integer number (3036464258688).

Almost surely, 2^{21002211122011} is an apocalyptic number.

21002211122011 is a deficient number, since it is larger than the sum of its proper divisors (3289502947493).

21002211122011 is an equidigital number, since it uses as much as digits as its factorization.

21002211122011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36148384121.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21002211122011 its reverse (11022111220012), we get a palindrome (32024322342023).

The spelling of 21002211122011 in words is "twenty-one trillion, two billion, two hundred eleven million, one hundred twenty-two thousand, eleven".