1002111001 has 4 divisors (see below), whose sum is σ = 1025415952. Its totient is φ = 978806052.

The previous prime is 1002110983. The next prime is 1002111013. The reversal of 1002111001 is 1001112001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1002111001 - 2¹⁹ = 1001586713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1002111031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11652411 + ... + 11652496.

It is an arithmetic number, because the mean of its divisors is an integer number (256353988).

Almost surely, 2^1002111001 is an apocalyptic number.

It is an amenable number.

1002111001 is a deficient number, since it is larger than the sum of its proper divisors (23304951).

1002111001 is an equidigital number, since it uses as much as digits as its factorization.

1002111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23304950.

The product of its (nonzero) digits is 2, while the sum is 7.

The square root of 1002111001 is about 31656.1368615945. The cubic root of 1002111001 is about 1000.7031724326.

Adding to 1002111001 its reverse (1001112001), we get a palindrome (2003223002).

The spelling of 1002111001 in words is "one billion, two million, one hundred eleven thousand, one".