21213613220054 has 8 divisors (see below), whose sum is σ = 31820441058480. Its totient is φ = 10606799533896.

The previous prime is 21213613220021. The next prime is 21213613220071. The reversal of 21213613220054 is 45002231631212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21213613220054.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1851032 + ... + 6771524.

It is an arithmetic number, because the mean of its divisors is an integer number (3977555132310).

Almost surely, 2^{21213613220054} is an apocalyptic number.

21213613220054 is a deficient number, since it is larger than the sum of its proper divisors (10606827838426).

21213613220054 is a wasteful number, since it uses less digits than its factorization.

21213613220054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7076134.

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 21213613220054 its reverse (45002231631212), we get a palindrome (66215844851266).

The spelling of 21213613220054 in words is "twenty-one trillion, two hundred thirteen billion, six hundred thirteen million, two hundred twenty thousand, fifty-four".