11111001002 has 4 divisors (see below), whose sum is σ = 16666501506. Its totient is φ = 5555500500.

The previous prime is 11111000993. The next prime is 11111001029. The reversal of 11111001002 is 20010011111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10989538561 + 121462441 = 104831^2 + 11021^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2777750249 + ... + 2777750252.

Almost surely, 2^11111001002 is an apocalyptic number.

11111001002 is a deficient number, since it is larger than the sum of its proper divisors (5555500504).

11111001002 is an equidigital number, since it uses as much as digits as its factorization.

11111001002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5555500503.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 11111001002 its reverse (20010011111), we get a palindrome (31121012113).

The spelling of 11111001002 in words is "eleven billion, one hundred eleven million, one thousand, two".