1111002002001 has 48 divisors (see below), whose sum is σ = 1700330382400. Its totient is φ = 697089908736.

The previous prime is 1111002001973. The next prime is 1111002002009. The reversal of 1111002002001 is 1002002001111.

It is a happy number.

It is not a de Polignac number, because 1111002002001 - 2¹³ = 1111001993809 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111002002009) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24366441 + ... + 24411993.

Almost surely, 2^{1111002002001} is an apocalyptic number.

It is an amenable number.

1111002002001 is a deficient number, since it is larger than the sum of its proper divisors (589328380399).

1111002002001 is a wasteful number, since it uses less digits than its factorization.

1111002002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46510 (or 46507 counting only the distinct ones).

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

Adding to 1111002002001 its reverse (1002002001111), we get a palindrome (2113004003112).

It can be divided in two parts, 111 and 1002002001, that multiplied together give a palindrome (111222222111).

The spelling of 1111002002001 in words is "one trillion, one hundred eleven billion, two million, two thousand, one".