21216053003433 has 8 divisors (see below), whose sum is σ = 29952074828448. Its totient is φ = 13312033257024.

The previous prime is 21216053003423. The next prime is 21216053003443. The reversal of 21216053003433 is 33430035061212.

It is an interprime number because it is at equal distance from previous prime (21216053003423) and next prime (21216053003443).

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

It is not a de Polignac number, because 21216053003433 - 2⁵ = 21216053003401 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21216053003394 and 21216053003403.

It is not an unprimeable number, because it can be changed into a prime (21216053003423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208000519591 + ... + 208000519692.

It is an arithmetic number, because the mean of its divisors is an integer number (3744009353556).

Almost surely, 2^{21216053003433} is an apocalyptic number.

It is an amenable number.

21216053003433 is a deficient number, since it is larger than the sum of its proper divisors (8736021825015).

21216053003433 is a wasteful number, since it uses less digits than its factorization.

21216053003433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416001039303.

The product of its (nonzero) digits is 38880, while the sum is 33.

Adding to 21216053003433 its reverse (33430035061212), we get a palindrome (54646088064645).

The spelling of 21216053003433 in words is "twenty-one trillion, two hundred sixteen billion, fifty-three million, three thousand, four hundred thirty-three".