216571700120 has 64 divisors (see below), whose sum is σ = 488640600000. Its totient is φ = 86388208128.

The previous prime is 216571700117. The next prime is 216571700123. The reversal of 216571700120 is 21007175612.

It is an interprime number because it is at equal distance from previous prime (216571700117) and next prime (216571700123).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216571700123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31162406 + ... + 31169354.

It is an arithmetic number, because the mean of its divisors is an integer number (7635009375).

Almost surely, 2^216571700120 is an apocalyptic number.

216571700120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216571700120 is an abundant number, since it is smaller than the sum of its proper divisors (272068899880).

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

216571700120 is a wasteful number, since it uses less digits than its factorization.

216571700120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9012 (or 9008 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 32.

Adding to 216571700120 its reverse (21007175612), we get a palindrome (237578875732).

The spelling of 216571700120 in words is "two hundred sixteen billion, five hundred seventy-one million, seven hundred thousand, one hundred twenty".