1012221121021 has 4 divisors (see below), whose sum is σ = 1104241222944. Its totient is φ = 920201019100.

The previous prime is 1012221121007. The next prime is 1012221121063. The reversal of 1012221121021 is 1201211222101.

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 not a de Polignac number, because 1012221121021 - 2²¹ = 1012219023869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012221120986 and 1012221121004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012221121091) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 46010050945 + ... + 46010050966.

It is an arithmetic number, because the mean of its divisors is an integer number (276060305736).

Almost surely, 2^{1012221121021} is an apocalyptic number.

1012221121021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1012221121021 is a deficient number, since it is larger than the sum of its proper divisors (92020101923).

1012221121021 is an equidigital number, since it uses as much as digits as its factorization.

1012221121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92020101922.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1012221121021 its reverse (1201211222101), we get a palindrome (2213432343122).

The spelling of 1012221121021 in words is "one trillion, twelve billion, two hundred twenty-one million, one hundred twenty-one thousand, twenty-one".