1100198021 has 16 divisors (see below), whose sum is σ = 1252473600. Its totient is φ = 958039488.

The previous prime is 1100197999. The next prime is 1100198023. The reversal of 1100198021 is 1208910011.

It is a cyclic number.

It is not a de Polignac number, because 1100198021 - 2²² = 1096003717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100198023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49715 + ... + 68351.

It is an arithmetic number, because the mean of its divisors is an integer number (78279600).

Almost surely, 2^1100198021 is an apocalyptic number.

It is an amenable number.

1100198021 is a deficient number, since it is larger than the sum of its proper divisors (152275579).

1100198021 is a wasteful number, since it uses less digits than its factorization.

1100198021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18908.

The product of its (nonzero) digits is 144, while the sum is 23.

The square root of 1100198021 is about 33169.2330481125. The cubic root of 1100198021 is about 1032.3420551157.

The spelling of 1100198021 in words is "one billion, one hundred million, one hundred ninety-eight thousand, twenty-one".