1012221002121 has 32 divisors (see below), whose sum is σ = 1592707473408. Its totient is φ = 559570878720.

The previous prime is 1012221002099. The next prime is 1012221002141. The reversal of 1012221002121 is 1212001222101.

It is not a de Polignac number, because 1012221002121 - 2¹⁰ = 1012221001097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1012221002121.

It is not an unprimeable number, because it can be changed into a prime (1012221002141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1754865 + ... + 2259201.

It is an arithmetic number, because the mean of its divisors is an integer number (49772108544).

Almost surely, 2^{1012221002121} is an apocalyptic number.

It is an amenable number.

1012221002121 is a deficient number, since it is larger than the sum of its proper divisors (580486471287).

1012221002121 is a wasteful number, since it uses less digits than its factorization.

1012221002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507461.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1012221002121 its reverse (1212001222101), we get a palindrome (2224222224222).

The spelling of 1012221002121 in words is "one trillion, twelve billion, two hundred twenty-one million, two thousand, one hundred twenty-one".