1012002021121 has 16 divisors (see below), whose sum is σ = 1269041727744. Its totient is φ = 785597252544.

The previous prime is 1012002021061. The next prime is 1012002021127. The reversal of 1012002021121 is 1211202002101.

It is a de Polignac number, because none of the positive numbers 2^k-1012002021121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (1012002021127) 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 15 ways as a sum of consecutive naturals, for example, 104909341 + ... + 104918986.

It is an arithmetic number, because the mean of its divisors is an integer number (79315107984).

Almost surely, 2^{1012002021121} is an apocalyptic number.

It is an amenable number.

1012002021121 is a deficient number, since it is larger than the sum of its proper divisors (257039706623).

1012002021121 is a wasteful number, since it uses less digits than its factorization.

1012002021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209828400.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1012002021121 its reverse (1211202002101), we get a palindrome (2223204023222).

The spelling of 1012002021121 in words is "one trillion, twelve billion, two million, twenty-one thousand, one hundred twenty-one".