21131030101223 has 32 divisors (see below), whose sum is σ = 25053258700800. Its totient is φ = 17438234978304.

The previous prime is 21131030101219. The next prime is 21131030101229. The reversal of 21131030101223 is 32210103013112.

It is a happy number.

It is not a de Polignac number, because 21131030101223 - 2² = 21131030101219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21131030101195 and 21131030101204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21131030101229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 446749511 + ... + 446796807.

It is an arithmetic number, because the mean of its divisors is an integer number (782914334400).

Almost surely, 2^{21131030101223} is an apocalyptic number.

21131030101223 is a deficient number, since it is larger than the sum of its proper divisors (3922228599577).

21131030101223 is a wasteful number, since it uses less digits than its factorization.

21131030101223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53519.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21131030101223 its reverse (32210103013112), we get a palindrome (53341133114335).

The spelling of 21131030101223 in words is "twenty-one trillion, one hundred thirty-one billion, thirty million, one hundred one thousand, two hundred twenty-three".