1002120002188 has 12 divisors (see below), whose sum is σ = 1778410145232. Its totient is φ = 494002817840.

The previous prime is 1002120002183. The next prime is 1002120002189. The reversal of 1002120002188 is 8812000212001.

It is not an unprimeable number, because it can be changed into a prime (1002120002183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1764295495 + ... + 1764296062.

It is an arithmetic number, because the mean of its divisors is an integer number (148200845436).

Almost surely, 2^{1002120002188} is an apocalyptic number.

It is an amenable number.

1002120002188 is a deficient number, since it is larger than the sum of its proper divisors (776290143044).

1002120002188 is a wasteful number, since it uses less digits than its factorization.

1002120002188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3528591632 (or 3528591630 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 25.

Adding to 1002120002188 its reverse (8812000212001), we get a palindrome (9814120214189).

The spelling of 1002120002188 in words is "one trillion, two billion, one hundred twenty million, two thousand, one hundred eighty-eight".