216102021220 has 12 divisors (see below), whose sum is σ = 453814244604. Its totient is φ = 86440808480.

The previous prime is 216102021181. The next prime is 216102021227. The reversal of 216102021220 is 22120201612.

It can be written as a sum of positive squares in 2 ways, for example, as 125010330624 + 91091690596 = 353568^2 + 301814^2 .

It is not an unprimeable number, because it can be changed into a prime (216102021227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5402550511 + ... + 5402550550.

It is an arithmetic number, because the mean of its divisors is an integer number (37817853717).

Almost surely, 2^216102021220 is an apocalyptic number.

216102021220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216102021220 is an abundant number, since it is smaller than the sum of its proper divisors (237712223384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216102021220 is a wasteful number, since it uses less digits than its factorization.

216102021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10805101070 (or 10805101068 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 216102021220 its reverse (22120201612), we get a palindrome (238222222832).

The spelling of 216102021220 in words is "two hundred sixteen billion, one hundred two million, twenty-one thousand, two hundred twenty".