21121130206266 has 32 divisors (see below), whose sum is σ = 45818004129408. Its totient is φ = 6464621391360.

The previous prime is 21121130206261. The next prime is 21121130206289. The reversal of 21121130206266 is 66260203112112.

It is a super-2 number, since 2×21121130206266² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21121130206261) 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, 2525238550 + ... + 2525246913.

It is an arithmetic number, because the mean of its divisors is an integer number (1431812629044).

Almost surely, 2^{21121130206266} is an apocalyptic number.

21121130206266 is an abundant number, since it is smaller than the sum of its proper divisors (24696873923142).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21121130206266 is a wasteful number, since it uses less digits than its factorization.

21121130206266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5050485526.

The product of its (nonzero) digits is 10368, while the sum is 33.

Adding to 21121130206266 its reverse (66260203112112), we get a palindrome (87381333318378).

The spelling of 21121130206266 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred thirty million, two hundred six thousand, two hundred sixty-six".