1012002012221 has 4 divisors (see below), whose sum is σ = 1012019175552. Its totient is φ = 1011984848892.

The previous prime is 1012002012139. The next prime is 1012002012223. The reversal of 1012002012221 is 1222102002101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1012002012221 - 2¹⁸ = 1012001750077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012002012196 and 1012002012205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012002012223) 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 3 ways as a sum of consecutive naturals, for example, 8492915 + ... + 8611248.

It is an arithmetic number, because the mean of its divisors is an integer number (253004793888).

Almost surely, 2^{1012002012221} is an apocalyptic number.

It is an amenable number.

1012002012221 is a deficient number, since it is larger than the sum of its proper divisors (17163331).

1012002012221 is an equidigital number, since it uses as much as digits as its factorization.

1012002012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17163330.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1012002012221 its reverse (1222102002101), we get a palindrome (2234104014322).

The spelling of 1012002012221 in words is "one trillion, twelve billion, two million, twelve thousand, two hundred twenty-one".