21212019054 has 48 divisors (see below), whose sum is σ = 47973088800. Its totient is φ = 6761069568.

The previous prime is 21212019053. The next prime is 21212019097. The reversal of 21212019054 is 45091021212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21212019053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1703202 + ... + 1715610.

It is an arithmetic number, because the mean of its divisors is an integer number (999439350).

Almost surely, 2^21212019054 is an apocalyptic number.

21212019054 is an abundant number, since it is smaller than the sum of its proper divisors (26761069746).

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

21212019054 is a wasteful number, since it uses less digits than its factorization.

21212019054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16569 (or 16566 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The spelling of 21212019054 in words is "twenty-one billion, two hundred twelve million, nineteen thousand, fifty-four".