1021002002122 has 8 divisors (see below), whose sum is σ = 1572894976356. Its totient is φ = 496703676672.

The previous prime is 1021002002093. The next prime is 1021002002129. The reversal of 1021002002122 is 2212002001201.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 790016991241 + 230985010881 = 888829^2 + 480609^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1021002002129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6898662103 + ... + 6898662250.

Almost surely, 2^{1021002002122} is an apocalyptic number.

1021002002122 is a deficient number, since it is larger than the sum of its proper divisors (551892974234).

1021002002122 is a wasteful number, since it uses less digits than its factorization.

1021002002122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13797324392.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1021002002122 its reverse (2212002001201), we get a palindrome (3233004003323).

The spelling of 1021002002122 in words is "one trillion, twenty-one billion, two million, two thousand, one hundred twenty-two".