1002002112091 has 16 divisors (see below), whose sum is σ = 1013474423520. Its totient is φ = 990561644800.

The previous prime is 1002002112061. The next prime is 1002002112109. The reversal of 1002002112091 is 1902112002001.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1002002112091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1002002112061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263891205 + ... + 263895001.

It is an arithmetic number, because the mean of its divisors is an integer number (63342151470).

Almost surely, 2^{1002002112091} is an apocalyptic number.

1002002112091 is a deficient number, since it is larger than the sum of its proper divisors (11472311429).

1002002112091 is a wasteful number, since it uses less digits than its factorization.

1002002112091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7214.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 1002002112091 its reverse (1902112002001), we get a palindrome (2904114114092).

The spelling of 1002002112091 in words is "one trillion, two billion, two million, one hundred twelve thousand, ninety-one".