21110343342442 has 16 divisors (see below), whose sum is σ = 32553571117320. Its totient is φ = 10259718432768.

The previous prime is 21110343342383. The next prime is 21110343342457. The reversal of 21110343342442 is 24424334301112.

It can be written as a sum of positive squares in 4 ways, for example, as 17479180617721 + 3631162724721 = 4180811^2 + 1905561^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21110343342398 and 21110343342407.

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, 141290503 + ... + 141439834.

Almost surely, 2^{21110343342442} is an apocalyptic number.

21110343342442 is a deficient number, since it is larger than the sum of its proper divisors (11443227774878).

21110343342442 is a wasteful number, since it uses less digits than its factorization.

21110343342442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282731385.

The product of its (nonzero) digits is 55296, while the sum is 34.

Adding to 21110343342442 its reverse (24424334301112), we get a palindrome (45534677643554).

The spelling of 21110343342442 in words is "twenty-one trillion, one hundred ten billion, three hundred forty-three million, three hundred forty-two thousand, four hundred forty-two".