1210221002021 has 2 divisors, whose sum is σ = 1210221002022. Its totient is φ = 1210221002020.

The previous prime is 1210221001961. The next prime is 1210221002033. The reversal of 1210221002021 is 1202001220121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 790978996900 + 419242005121 = 889370^2 + 647489^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210221002021 - 2¹⁴ = 1210220985637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1210221001987 and 1210221002005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1210221002321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605110501010 + 605110501011.

It is an arithmetic number, because the mean of its divisors is an integer number (605110501011).

Almost surely, 2^{1210221002021} is an apocalyptic number.

It is an amenable number.

1210221002021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210221002021 is an equidigital number, since it uses as much as digits as its factorization.

1210221002021 is an evil number, because the sum of its binary digits is even.

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

Adding to 1210221002021 its reverse (1202001220121), we get a palindrome (2412222222142).

The spelling of 1210221002021 in words is "one trillion, two hundred ten billion, two hundred twenty-one million, two thousand, twenty-one".