201111001002 has 12 divisors (see below), whose sum is σ = 435740502210. Its totient is φ = 67037000328.

The previous prime is 201111000941. The next prime is 201111001027. The reversal of 201111001002 is 200100111102.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 197954696241 + 3156304761 = 444921^2 + 56181^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5586416677 + ... + 5586416712.

Almost surely, 2^201111001002 is an apocalyptic number.

201111001002 is an abundant number, since it is smaller than the sum of its proper divisors (234629501208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201111001002 is a wasteful number, since it uses less digits than its factorization.

201111001002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11172833397 (or 11172833394 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 201111001002 its reverse (200100111102), we get a palindrome (401211112104).

The spelling of 201111001002 in words is "two hundred one billion, one hundred eleven million, one thousand, two".