21103431442122 has 16 divisors (see below), whose sum is σ = 42236398844640. Its totient is φ = 7029554487312.

The previous prime is 21103431442087. The next prime is 21103431442141. The reversal of 21103431442122 is 22124413430112.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21103431442122.

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, 1230655728 + ... + 1230672875.

It is an arithmetic number, because the mean of its divisors is an integer number (2639774927790).

Almost surely, 2^{21103431442122} is an apocalyptic number.

21103431442122 is an abundant number, since it is smaller than the sum of its proper divisors (21132967402518).

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

21103431442122 is a wasteful number, since it uses less digits than its factorization.

21103431442122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2461330037.

The product of its (nonzero) digits is 9216, while the sum is 30.

Adding to 21103431442122 its reverse (22124413430112), we get a palindrome (43227844872234).

The spelling of 21103431442122 in words is "twenty-one trillion, one hundred three billion, four hundred thirty-one million, four hundred forty-two thousand, one hundred twenty-two".