221132426220 has 96 divisors (see below), whose sum is σ = 706561329600. Its totient is φ = 57374894592.

The previous prime is 221132426213. The next prime is 221132426239. The reversal of 221132426220 is 22624231122.

221132426220 is a `hidden beast` number, since 2 + 2 + 1 + 1 + 32 + 4 + 2 + 622 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5513865 + ... + 5553824.

It is an arithmetic number, because the mean of its divisors is an integer number (7360013850).

Almost surely, 2^221132426220 is an apocalyptic number.

221132426220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221132426220 is an abundant number, since it is smaller than the sum of its proper divisors (485428903380).

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

221132426220 is a wasteful number, since it uses less digits than its factorization.

221132426220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11067744 (or 11067736 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 221132426220 its reverse (22624231122), we get a palindrome (243756657342).

The spelling of 221132426220 in words is "two hundred twenty-one billion, one hundred thirty-two million, four hundred twenty-six thousand, two hundred twenty".