216653002021 has 8 divisors (see below), whose sum is σ = 216858232800. Its totient is φ = 216447871920.

The previous prime is 216653002003. The next prime is 216653002031. The reversal of 216653002021 is 120200356612.

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

It is a cyclic number.

It is not a de Polignac number, because 216653002021 - 2⁵ = 216653001989 is a prime.

It is a super-2 number, since 2×216653002021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216653002031) 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, 4689010 + ... + 4734988.

It is an arithmetic number, because the mean of its divisors is an integer number (27107279100).

Almost surely, 2^216653002021 is an apocalyptic number.

It is an amenable number.

216653002021 is a deficient number, since it is larger than the sum of its proper divisors (205230779).

216653002021 is a wasteful number, since it uses less digits than its factorization.

216653002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50339.

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 216653002021 its reverse (120200356612), we get a palindrome (336853358633).

The spelling of 216653002021 in words is "two hundred sixteen billion, six hundred fifty-three million, two thousand, twenty-one".