21213421535054 has 16 divisors (see below), whose sum is σ = 38279858409600. Its totient is φ = 8612968141944.

The previous prime is 21213421535021. The next prime is 21213421535093. The reversal of 21213421535054 is 45053512431212.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 21213421534999 and 21213421535017.

It is a congruent number.

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, 39874852244 + ... + 39874852775.

It is an arithmetic number, because the mean of its divisors is an integer number (2392491150600).

Almost surely, 2^{21213421535054} is an apocalyptic number.

21213421535054 is a deficient number, since it is larger than the sum of its proper divisors (17066436874546).

21213421535054 is a wasteful number, since it uses less digits than its factorization.

21213421535054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79749705047.

The product of its (nonzero) digits is 144000, while the sum is 38.

Adding to 21213421535054 its reverse (45053512431212), we get a palindrome (66266933966266).

The spelling of 21213421535054 in words is "twenty-one trillion, two hundred thirteen billion, four hundred twenty-one million, five hundred thirty-five thousand, fifty-four".