21122021101011 has 16 divisors (see below), whose sum is σ = 28519375772160. Its totient is φ = 13903009305120.

The previous prime is 21122021100967. The next prime is 21122021101073. The reversal of 21122021101011 is 11010112022112.

It is a happy number.

It is not a de Polignac number, because 21122021101011 - 2³³ = 21113431166419 is a prime.

It is a super-2 number, since 2×21122021101011² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21122021101081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68332396 + ... + 68640806.

It is an arithmetic number, because the mean of its divisors is an integer number (1782460985760).

Almost surely, 2^{21122021101011} is an apocalyptic number.

21122021101011 is a deficient number, since it is larger than the sum of its proper divisors (7397354671149).

21122021101011 is a wasteful number, since it uses less digits than its factorization.

21122021101011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597466.

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

Adding to 21122021101011 its reverse (11010112022112), we get a palindrome (32132133123123).

The spelling of 21122021101011 in words is "twenty-one trillion, one hundred twenty-two billion, twenty-one million, one hundred one thousand, eleven".