1002121201128 has 32 divisors (see below), whose sum is σ = 2637161056800. Its totient is φ = 316459326528.

The previous prime is 1002121201121. The next prime is 1002121201139. The reversal of 1002121201128 is 8211021212001.

It is not an unprimeable number, because it can be changed into a prime (1002121201121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1098816651 + ... + 1098817562.

It is an arithmetic number, because the mean of its divisors is an integer number (82411283025).

Almost surely, 2^{1002121201128} is an apocalyptic number.

It is an amenable number.

1002121201128 is an abundant number, since it is smaller than the sum of its proper divisors (1635039855672).

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

1002121201128 is a wasteful number, since it uses less digits than its factorization.

1002121201128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2197634241 (or 2197634237 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 1002121201128 its reverse (8211021212001), we get a palindrome (9213142413129).

The spelling of 1002121201128 in words is "one trillion, two billion, one hundred twenty-one million, two hundred one thousand, one hundred twenty-eight".