1021002002012 has 24 divisors (see below), whose sum is σ = 1844445332352. Its totient is φ = 494018596800.

The previous prime is 1021002001991. The next prime is 1021002002057. The reversal of 1021002002012 is 2102002001201.

It is a happy number.

It is a super-2 number, since 2×1021002002012² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1021002001984 and 1021002002002.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4919462 + ... + 5122802.

It is an arithmetic number, because the mean of its divisors is an integer number (76851888848).

Almost surely, 2^{1021002002012} is an apocalyptic number.

It is an amenable number.

1021002002012 is a deficient number, since it is larger than the sum of its proper divisors (823443330340).

1021002002012 is a wasteful number, since it uses less digits than its factorization.

1021002002012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243869 (or 243867 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1021002002012 its reverse (2102002001201), we get a palindrome (3123004003213).

The spelling of 1021002002012 in words is "one trillion, twenty-one billion, two million, two thousand, twelve".