201001111002 has 24 divisors (see below), whose sum is σ = 446124418740. Its totient is φ = 65366214720.

The previous prime is 201001110949. The next prime is 201001111063. The reversal of 201001111002 is 200111100102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 196888325841 + 4112785161 = 443721^2 + 64131^2 .

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 11 ways as a sum of consecutive naturals, for example, 136178877 + ... + 136180352.

Almost surely, 2^201001111002 is an apocalyptic number.

201001111002 is an abundant number, since it is smaller than the sum of its proper divisors (245123307738).

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

201001111002 is a wasteful number, since it uses less digits than its factorization.

201001111002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272359278 (or 272359275 counting only the distinct ones).

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

Adding to 201001111002 its reverse (200111100102), we get a palindrome (401112211104).

The spelling of 201001111002 in words is "two hundred one billion, one million, one hundred eleven thousand, two".