221101020272 has 40 divisors (see below), whose sum is σ = 467502077952. Its totient is φ = 100462846400.

The previous prime is 221101020271. The next prime is 221101020293. The reversal of 221101020272 is 272020101122.

It is a super-2 number, since 2×221101020272² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221101020271) 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, 239147 + ... + 706677.

Almost surely, 2^221101020272 is an apocalyptic number.

221101020272 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221101020272 is an abundant number, since it is smaller than the sum of its proper divisors (246401057680).

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

221101020272 is a wasteful number, since it uses less digits than its factorization.

221101020272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470237 (or 470231 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

Adding to 221101020272 its reverse (272020101122), we get a palindrome (493121121394).

The spelling of 221101020272 in words is "two hundred twenty-one billion, one hundred one million, twenty thousand, two hundred seventy-two".