21231111342034 has 16 divisors (see below), whose sum is σ = 34770746012256. Its totient is φ = 9642469752000.

The previous prime is 21231111342029. The next prime is 21231111342043. The reversal of 21231111342034 is 43024311113212.

It is a junction number, because it is equal to n+sod(n) for n = 21231111341993 and 21231111342011.

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, 401743152 + ... + 401795995.

It is an arithmetic number, because the mean of its divisors is an integer number (2173171625766).

Almost surely, 2^{21231111342034} is an apocalyptic number.

21231111342034 is a deficient number, since it is larger than the sum of its proper divisors (13539634670222).

21231111342034 is a wasteful number, since it uses less digits than its factorization.

21231111342034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803540361.

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 21231111342034 its reverse (43024311113212), we get a palindrome (64255422455246).

The spelling of 21231111342034 in words is "twenty-one trillion, two hundred thirty-one billion, one hundred eleven million, three hundred forty-two thousand, thirty-four".