1012220122021 has 2 divisors, whose sum is σ = 1012220122022. Its totient is φ = 1012220122020.

The previous prime is 1012220122013. The next prime is 1012220122049. The reversal of 1012220122021 is 1202210222101.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 829283422500 + 182936699521 = 910650^2 + 427711^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012220122021 - 2³ = 1012220122013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1012220121986 and 1012220122004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012220122051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506110061010 + 506110061011.

It is an arithmetic number, because the mean of its divisors is an integer number (506110061011).

Almost surely, 2^{1012220122021} is an apocalyptic number.

It is an amenable number.

1012220122021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012220122021 is an equidigital number, since it uses as much as digits as its factorization.

1012220122021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1012220122021 its reverse (1202210222101), we get a palindrome (2214430344122).

The spelling of 1012220122021 in words is "one trillion, twelve billion, two hundred twenty million, one hundred twenty-two thousand, twenty-one".