21022101011011 has 4 divisors (see below), whose sum is σ = 21022703691912. Its totient is φ = 21021498330112.

The previous prime is 21022101010973. The next prime is 21022101011063. The reversal of 21022101011011 is 11011010122012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21022101011011 - 2³⁵ = 20987741272643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21022101010982 and 21022101011000.

It is not an unprimeable number, because it can be changed into a prime (21022101011081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301288126 + ... + 301357891.

It is an arithmetic number, because the mean of its divisors is an integer number (5255675922978).

Almost surely, 2^{21022101011011} is an apocalyptic number.

21022101011011 is a deficient number, since it is larger than the sum of its proper divisors (602680901).

21022101011011 is an equidigital number, since it uses as much as digits as its factorization.

21022101011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602680900.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21022101011011 its reverse (11011010122012), we get a palindrome (32033111133023).

The spelling of 21022101011011 in words is "twenty-one trillion, twenty-two billion, one hundred one million, eleven thousand, eleven".