21612514234142 has 32 divisors (see below), whose sum is σ = 35665539840000. Its totient is φ = 9759980295648.

The previous prime is 21612514234123. The next prime is 21612514234159. The reversal of 21612514234142 is 24143241521612.

It is a junction number, because it is equal to n+sod(n) for n = 21612514234096 and 21612514234105.

It is a congruent 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, 1748459 + ... + 6803097.

It is an arithmetic number, because the mean of its divisors is an integer number (1114548120000).

Almost surely, 2^{21612514234142} is an apocalyptic number.

21612514234142 is a deficient number, since it is larger than the sum of its proper divisors (14053025605858).

21612514234142 is a wasteful number, since it uses less digits than its factorization.

21612514234142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5058200.

The product of its digits is 92160, while the sum is 38.

Adding to 21612514234142 its reverse (24143241521612), we get a palindrome (45755755755754).

The spelling of 21612514234142 in words is "twenty-one trillion, six hundred twelve billion, five hundred fourteen million, two hundred thirty-four thousand, one hundred forty-two".