221130988 has 12 divisors (see below), whose sum is σ = 416746960. Its totient is φ = 102060432.

The previous prime is 221130977. The next prime is 221131073. The reversal of 221130988 is 889031122.

221130988 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221130988² = 97797827707712288, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2126208 + ... + 2126311.

Almost surely, 2^221130988 is an apocalyptic number.

It is an amenable number.

221130988 is a deficient number, since it is larger than the sum of its proper divisors (195615972).

221130988 is a wasteful number, since it uses less digits than its factorization.

221130988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4252536 (or 4252534 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 221130988 is about 14870.4736979022. The cubic root of 221130988 is about 604.7137848875.

The spelling of 221130988 in words is "two hundred twenty-one million, one hundred thirty thousand, nine hundred eighty-eight".