1012202221021 has 2 divisors, whose sum is σ = 1012202221022. Its totient is φ = 1012202221020.

The previous prime is 1012202220959. The next prime is 1012202221061. The reversal of 1012202221021 is 1201222022101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 730018156921 + 282184064100 = 854411^2 + 531210^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012202221021 - 2⁷ = 1012202220893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1012202220986 and 1012202221004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012202221061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506101110510 + 506101110511.

It is an arithmetic number, because the mean of its divisors is an integer number (506101110511).

Almost surely, 2^{1012202221021} is an apocalyptic number.

It is an amenable number.

1012202221021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012202221021 is an equidigital number, since it uses as much as digits as its factorization.

1012202221021 is an evil number, because the sum of its binary digits is even.

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

Adding to 1012202221021 its reverse (1201222022101), we get a palindrome (2213424243122).

The spelling of 1012202221021 in words is "one trillion, twelve billion, two hundred two million, two hundred twenty-one thousand, twenty-one".