21022211011011 has 16 divisors (see below), whose sum is σ = 32033950137600. Its totient is φ = 12012652711008.

The previous prime is 21022211011003. The next prime is 21022211011013. The reversal of 21022211011011 is 11011011222012.

It is a happy number.

It is not a de Polignac number, because 21022211011011 - 2³ = 21022211011003 is a prime.

It is a super-4 number, since 4×21022211011011⁴ (a number of 54 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (21022211011013) 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, 5699980 + ... + 8633318.

It is an arithmetic number, because the mean of its divisors is an integer number (2002121883600).

Almost surely, 2^{21022211011011} is an apocalyptic number.

21022211011011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21022211011011 is a deficient number, since it is larger than the sum of its proper divisors (11011739126589).

21022211011011 is a wasteful number, since it uses less digits than its factorization.

21022211011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3274618.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21022211011011 its reverse (11011011222012), we get a palindrome (32033222233023).

The spelling of 21022211011011 in words is "twenty-one trillion, twenty-two billion, two hundred eleven million, eleven thousand, eleven".