221421124092 has 24 divisors (see below), whose sum is σ = 590456331136. Its totient is φ = 63263178288.

The previous prime is 221421124079. The next prime is 221421124103. The reversal of 221421124092 is 290421124122.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1317982798 + ... + 1317982965.

Almost surely, 2^221421124092 is an apocalyptic number.

It is an amenable number.

221421124092 is an abundant number, since it is smaller than the sum of its proper divisors (369035207044).

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

221421124092 is a wasteful number, since it uses less digits than its factorization.

221421124092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2635965777 (or 2635965775 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

Adding to 221421124092 its sum of digits (30), we get a palindrome (221421124122).

The spelling of 221421124092 in words is "two hundred twenty-one billion, four hundred twenty-one million, one hundred twenty-four thousand, ninety-two".