21001002220011 has 16 divisors (see below), whose sum is σ = 30843484289280. Its totient is φ = 12604308479520.

The previous prime is 21001002219997. The next prime is 21001002220021. The reversal of 21001002220011 is 11002220010012.

It is not a de Polignac number, because 21001002220011 - 2¹⁷ = 21001002088939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21001002220021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3089287896 + ... + 3089294693.

It is an arithmetic number, because the mean of its divisors is an integer number (1927717768080).

Almost surely, 2^{21001002220011} is an apocalyptic number.

21001002220011 is a deficient number, since it is larger than the sum of its proper divisors (9842482069269).

21001002220011 is a wasteful number, since it uses less digits than its factorization.

21001002220011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6178582706.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21001002220011 its reverse (11002220010012), we get a palindrome (32003222230023).

The spelling of 21001002220011 in words is "twenty-one trillion, one billion, two million, two hundred twenty thousand, eleven".