1000021099 has 32 divisors (see below), whose sum is σ = 1269043200. Its totient is φ = 765456000.

The previous prime is 1000021097. The next prime is 1000021133. The reversal of 1000021099 is 9901200001.

It is a cyclic number.

It is not a de Polignac number, because 1000021099 - 2¹ = 1000021097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000021097) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1158342 + ... + 1159204.

It is an arithmetic number, because the mean of its divisors is an integer number (39657600).

Almost surely, 2^1000021099 is an apocalyptic number.

1000021099 is a deficient number, since it is larger than the sum of its proper divisors (269022101).

1000021099 is a wasteful number, since it uses less digits than its factorization.

1000021099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 1000021099 is about 31623.1102044059. The cubic root of 1000021099 is about 1000.0070329505.

It can be divided in two parts, 100002 and 1099, that added together give a palindrome (101101).

The spelling of 1000021099 in words is "one billion, twenty-one thousand, ninety-nine".