21021000111122 has 16 divisors (see below), whose sum is σ = 34398071125344. Its totient is φ = 9554980344000.

The previous prime is 21021000111109. The next prime is 21021000111127. The reversal of 21021000111122 is 22111100012012.

It is a super-2 number, since 2×21021000111122² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21021000111097 and 21021000111106.

It is not an unprimeable number, because it can be changed into a prime (21021000111127) 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, 18395297 + ... + 19504587.

It is an arithmetic number, because the mean of its divisors is an integer number (2149879445334).

Almost surely, 2^{21021000111122} is an apocalyptic number.

21021000111122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21021000111122 is a deficient number, since it is larger than the sum of its proper divisors (13377071014222).

21021000111122 is a wasteful number, since it uses less digits than its factorization.

21021000111122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1970665.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21021000111122 its reverse (22111100012012), we get a palindrome (43132100123134).

The spelling of 21021000111122 in words is "twenty-one trillion, twenty-one billion, one hundred eleven thousand, one hundred twenty-two".