21213430540154 has 32 divisors (see below), whose sum is σ = 32455098973440. Its totient is φ = 10395494246592.

The previous prime is 21213430540111. The next prime is 21213430540229. The reversal of 21213430540154 is 45104503431212.

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, 1002372377 + ... + 1002393539.

It is an arithmetic number, because the mean of its divisors is an integer number (1014221842920).

Almost surely, 2^{21213430540154} is an apocalyptic number.

21213430540154 is a deficient number, since it is larger than the sum of its proper divisors (11241668433286).

21213430540154 is a wasteful number, since it uses less digits than its factorization.

21213430540154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30854.

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 21213430540154 its reverse (45104503431212), we get a palindrome (66317933971366).

The spelling of 21213430540154 in words is "twenty-one trillion, two hundred thirteen billion, four hundred thirty million, five hundred forty thousand, one hundred fifty-four".