1012220213021 has 4 divisors (see below), whose sum is σ = 1015087692732. Its totient is φ = 1009352733312.

The previous prime is 1012220212943. The next prime is 1012220213119. The reversal of 1012220213021 is 1203120222101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 577583280121 + 434636932900 = 759989^2 + 659270^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012220213021 - 2²² = 1012216018717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012220413021) 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, 1433739326 + ... + 1433740031.

It is an arithmetic number, because the mean of its divisors is an integer number (253771923183).

Almost surely, 2^{1012220213021} is an apocalyptic number.

It is an amenable number.

1012220213021 is a deficient number, since it is larger than the sum of its proper divisors (2867479711).

1012220213021 is an equidigital number, since it uses as much as digits as its factorization.

1012220213021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2867479710.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1012220213021 its reverse (1203120222101), we get a palindrome (2215340435122).

The spelling of 1012220213021 in words is "one trillion, twelve billion, two hundred twenty million, two hundred thirteen thousand, twenty-one".