1020200002121 has 8 divisors (see below), whose sum is σ = 1048094709984. Its totient is φ = 992448712480.

The previous prime is 1020200002117. The next prime is 1020200002189. The reversal of 1020200002121 is 1212000020201.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1020200002121 - 2² = 1020200002117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020200002111) 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, 35840135 + ... + 35868588.

It is an arithmetic number, because the mean of its divisors is an integer number (131011838748).

Almost surely, 2^{1020200002121} is an apocalyptic number.

It is an amenable number.

1020200002121 is a deficient number, since it is larger than the sum of its proper divisors (27894707863).

1020200002121 is an equidigital number, since it uses as much as digits as its factorization.

1020200002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71709111.

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

Adding to 1020200002121 its reverse (1212000020201), we get a palindrome (2232200022322).

The spelling of 1020200002121 in words is "one trillion, twenty billion, two hundred million, two thousand, one hundred twenty-one".