21131431231022 has 16 divisors (see below), whose sum is σ = 36227972090592. Its totient is φ = 9055662318240.

The previous prime is 21131431231013. The next prime is 21131431231067. The reversal of 21131431231022 is 22013213413112.

It is a junction number, because it is equal to n+sod(n) for n = 21131431230982 and 21131431231000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55248629 + ... + 55629792.

It is an arithmetic number, because the mean of its divisors is an integer number (2264248255662).

Almost surely, 2^{21131431231022} is an apocalyptic number.

21131431231022 is a deficient number, since it is larger than the sum of its proper divisors (15096540859570).

21131431231022 is a wasteful number, since it uses less digits than its factorization.

21131431231022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110892043.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 21131431231022 its reverse (22013213413112), we get a palindrome (43144644644134).

The spelling of 21131431231022 in words is "twenty-one trillion, one hundred thirty-one billion, four hundred thirty-one million, two hundred thirty-one thousand, twenty-two".