1002150021455 has 24 divisors (see below), whose sum is σ = 1348320783600. Its totient is φ = 709138045440.

The previous prime is 1002150021451. The next prime is 1002150021503. The reversal of 1002150021455 is 5541200512001.

It is not a de Polignac number, because 1002150021455 - 2² = 1002150021451 is a prime.

It is a super-3 number, since 3×1002150021455³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002150021451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6579530 + ... + 6730119.

It is an arithmetic number, because the mean of its divisors is an integer number (56180032650).

Almost surely, 2^{1002150021455} is an apocalyptic number.

1002150021455 is a deficient number, since it is larger than the sum of its proper divisors (346170762145).

1002150021455 is a wasteful number, since it uses less digits than its factorization.

1002150021455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13309739 (or 13309702 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 26.

Adding to 1002150021455 its reverse (5541200512001), we get a palindrome (6543350533456).

The spelling of 1002150021455 in words is "one trillion, two billion, one hundred fifty million, twenty-one thousand, four hundred fifty-five".