221211228760 has 32 divisors (see below), whose sum is σ = 497738726640. Its totient is φ = 88482098304.

The previous prime is 221211228751. The next prime is 221211228767. The reversal of 221211228760 is 67822112122.

221211228760 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221211228760² (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 (221211228767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2632759 + ... + 2715481.

Almost surely, 2^221211228760 is an apocalyptic number.

221211228760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221211228760 is an abundant number, since it is smaller than the sum of its proper divisors (276527497880).

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

221211228760 is a wasteful number, since it uses less digits than its factorization.

221211228760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149587 (or 149583 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The spelling of 221211228760 in words is "two hundred twenty-one billion, two hundred eleven million, two hundred twenty-eight thousand, seven hundred sixty".