216565121002 has 16 divisors (see below), whose sum is σ = 332784047232. Its totient is φ = 105637315680.

The previous prime is 216565120979. The next prime is 216565121077. The reversal of 216565121002 is 200121565612.

216565121002 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×216565121002² (a number of 23 digits) contains 22 as substring.

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, 3366463 + ... + 3430189.

It is an arithmetic number, because the mean of its divisors is an integer number (20799002952).

Almost surely, 2^216565121002 is an apocalyptic number.

216565121002 is a deficient number, since it is larger than the sum of its proper divisors (116218926230).

216565121002 is a wasteful number, since it uses less digits than its factorization.

216565121002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105213.

The product of its (nonzero) digits is 7200, while the sum is 31.

Adding to 216565121002 its reverse (200121565612), we get a palindrome (416686686614).

The spelling of 216565121002 in words is "two hundred sixteen billion, five hundred sixty-five million, one hundred twenty-one thousand, two".