1000021101 has 8 divisors (see below), whose sum is σ = 1349426400. Its totient is φ = 658648272.

The previous prime is 1000021097. The next prime is 1000021133. The reversal of 1000021101 is 1011200001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1000021101 - 2² = 1000021097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1000021101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000021801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2007826 + ... + 2008323.

It is an arithmetic number, because the mean of its divisors is an integer number (168678300).

Almost surely, 2^1000021101 is an apocalyptic number.

It is an amenable number.

1000021101 is a deficient number, since it is larger than the sum of its proper divisors (349405299).

1000021101 is an equidigital number, since it uses as much as digits as its factorization.

1000021101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4016235.

The product of its (nonzero) digits is 2, while the sum is 6.

The square root of 1000021101 is about 31623.1102360283. The cubic root of 1000021101 is about 1000.0070336172.

Adding to 1000021101 its reverse (1011200001), we get a palindrome (2011221102).

The spelling of 1000021101 in words is "one billion, twenty-one thousand, one hundred one".