21211122201011 has 8 divisors (see below), whose sum is σ = 21367264290000. Its totient is φ = 21055163919840.

The previous prime is 21211122200971. The next prime is 21211122201023. The reversal of 21211122201011 is 11010222111212.

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-21211122201011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21211122231011) 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, 45720305 + ... + 46181906.

It is an arithmetic number, because the mean of its divisors is an integer number (2670908036250).

Almost surely, 2^{21211122201011} is an apocalyptic number.

21211122201011 is a deficient number, since it is larger than the sum of its proper divisors (156142088989).

21211122201011 is a wasteful number, since it uses less digits than its factorization.

21211122201011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91903909.

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

Adding to 21211122201011 its reverse (11010222111212), we get a palindrome (32221344312223).

The spelling of 21211122201011 in words is "twenty-one trillion, two hundred eleven billion, one hundred twenty-two million, two hundred one thousand, eleven".