21343111421142 has 64 divisors (see below), whose sum is σ = 48899706605568. Its totient is φ = 6083616564000.

The previous prime is 21343111421131. The next prime is 21343111421147. The reversal of 21343111421142 is 24112411134312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21343111421147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31325967 + ... + 32000037.

It is an arithmetic number, because the mean of its divisors is an integer number (764057915712).

Almost surely, 2^{21343111421142} is an apocalyptic number.

21343111421142 is an abundant number, since it is smaller than the sum of its proper divisors (27556595184426).

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

21343111421142 is a wasteful number, since it uses less digits than its factorization.

21343111421142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675865.

The product of its digits is 4608, while the sum is 30.

Adding to 21343111421142 its reverse (24112411134312), we get a palindrome (45455522555454).

The spelling of 21343111421142 in words is "twenty-one trillion, three hundred forty-three billion, one hundred eleven million, four hundred twenty-one thousand, one hundred forty-two".