1101021002001 has 12 divisors (see below), whose sum is σ = 1590398795700. Its totient is φ = 733997789280.

The previous prime is 1101021001987. The next prime is 1101021002051. The reversal of 1101021002001 is 1002001201011.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 560319617025 + 540701384976 = 748545^2 + 735324^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1101021002001 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1101021002051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 913426 + ... + 1742523.

It is an arithmetic number, because the mean of its divisors is an integer number (132533232975).

Almost surely, 2^{1101021002001} is an apocalyptic number.

It is an amenable number.

1101021002001 is a deficient number, since it is larger than the sum of its proper divisors (489377793699).

1101021002001 is a wasteful number, since it uses less digits than its factorization.

1101021002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2702016 (or 2702013 counting only the distinct ones).

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

Adding to 1101021002001 its reverse (1002001201011), we get a palindrome (2103022203012).

The spelling of 1101021002001 in words is "one trillion, one hundred one billion, twenty-one million, two thousand, one".