221144148980 has 24 divisors (see below), whose sum is σ = 471334099488. Its totient is φ = 87137395488.

The previous prime is 221144148959. The next prime is 221144148997. The reversal of 221144148980 is 89841441122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82515134 + ... + 82517813.

It is an arithmetic number, because the mean of its divisors is an integer number (19638920812).

Almost surely, 2^221144148980 is an apocalyptic number.

221144148980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221144148980 is an abundant number, since it is smaller than the sum of its proper divisors (250189950508).

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

221144148980 is a wasteful number, since it uses less digits than its factorization.

221144148980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165033023 (or 165033021 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 44.

The spelling of 221144148980 in words is "two hundred twenty-one billion, one hundred forty-four million, one hundred forty-eight thousand, nine hundred eighty".