1101099021 has 24 divisors (see below), whose sum is σ = 1646122464. Its totient is φ = 649270080.

The previous prime is 1101098897. The next prime is 1101099031. The reversal of 1101099021 is 1209901011.

It is not a de Polignac number, because 1101099021 - 2¹⁷ = 1100967949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1101098982 and 1101099000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101099031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32991 + ... + 57363.

It is an arithmetic number, because the mean of its divisors is an integer number (68588436).

Almost surely, 2^1101099021 is an apocalyptic number.

1101099021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1101099021 is a deficient number, since it is larger than the sum of its proper divisors (545023443).

1101099021 is a wasteful number, since it uses less digits than its factorization.

1101099021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24461 (or 24424 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 24.

The square root of 1101099021 is about 33182.8121321867. The cubic root of 1101099021 is about 1032.6237881549.

It can be divided in two parts, 11010990 and 21, that added together give a palindrome (11011011).

The spelling of 1101099021 in words is "one billion, one hundred one million, ninety-nine thousand, twenty-one".