217072221120 has 84 divisors (see below), whose sum is σ = 746638003800. Its totient is φ = 57885924864.

The previous prime is 217072221109. The next prime is 217072221131. The reversal of 217072221120 is 21122270712.

It is an interprime number because it is at equal distance from previous prime (217072221109) and next prime (217072221131).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37683270 + ... + 37689029.

Almost surely, 2^217072221120 is an apocalyptic number.

217072221120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

217072221120 is an abundant number, since it is smaller than the sum of its proper divisors (529565782680).

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

217072221120 is a wasteful number, since it uses less digits than its factorization.

217072221120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75372322 (or 75372309 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

Adding to 217072221120 its reverse (21122270712), we get a palindrome (238194491832).

The spelling of 217072221120 in words is "two hundred seventeen billion, seventy-two million, two hundred twenty-one thousand, one hundred twenty".