21103034142442 has 32 divisors (see below), whose sum is σ = 37601465512320. Its totient is φ = 8690904694080.

The previous prime is 21103034142427. The next prime is 21103034142461. The reversal of 21103034142442 is 24424143030112.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123084753 + ... + 123256084.

It is an arithmetic number, because the mean of its divisors is an integer number (1175045797260).

Almost surely, 2^{21103034142442} is an apocalyptic number.

21103034142442 is a deficient number, since it is larger than the sum of its proper divisors (16498431369878).

21103034142442 is a wasteful number, since it uses less digits than its factorization.

21103034142442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246341086.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 21103034142442 its reverse (24424143030112), we get a palindrome (45527177172554).

The spelling of 21103034142442 in words is "twenty-one trillion, one hundred three billion, thirty-four million, one hundred forty-two thousand, four hundred forty-two".