21101020222011 has 8 divisors (see below), whose sum is σ = 28160481620544. Its totient is φ = 14054452819080.

The previous prime is 21101020221907. The next prime is 21101020222081. The reversal of 21101020222011 is 11022202010112.

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

It is not a de Polignac number, because 21101020222011 - 2¹⁵ = 21101020189243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21101020222081) 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, 3223495081 + ... + 3223501626.

It is an arithmetic number, because the mean of its divisors is an integer number (3520060202568).

Almost surely, 2^{21101020222011} is an apocalyptic number.

21101020222011 is a deficient number, since it is larger than the sum of its proper divisors (7059461398533).

21101020222011 is a wasteful number, since it uses less digits than its factorization.

21101020222011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6446997801.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21101020222011 its reverse (11022202010112), we get a palindrome (32123222232123).

The spelling of 21101020222011 in words is "twenty-one trillion, one hundred one billion, twenty million, two hundred twenty-two thousand, eleven".