1099021228 has 6 divisors (see below), whose sum is σ = 1923287156. Its totient is φ = 549510612.

The previous prime is 1099021223. The next prime is 1099021229. The reversal of 1099021228 is 8221209901.

It is a junction number, because it is equal to n+sod(n) for n = 1099021193 and 1099021202.

It is not an unprimeable number, because it can be changed into a prime (1099021223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137377650 + ... + 137377657.

Almost surely, 2^1099021228 is an apocalyptic number.

It is an amenable number.

1099021228 is a deficient number, since it is larger than the sum of its proper divisors (824265928).

1099021228 is a wasteful number, since it uses less digits than its factorization.

1099021228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274755311 (or 274755309 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 1099021228 is about 33151.4890766614. The cubic root of 1099021228 is about 1031.9738528219.

The spelling of 1099021228 in words is "one billion, ninety-nine million, twenty-one thousand, two hundred twenty-eight".