1222020210121 has 2 divisors, whose sum is σ = 1222020210122. Its totient is φ = 1222020210120.

The previous prime is 1222020210067. The next prime is 1222020210143. The reversal of 1222020210121 is 1210120202221.

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., 1148069390400 + 73950819721 = 1071480^2 + 271939^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222020210121 - 2⁹ = 1222020209609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1222020210095 and 1222020210104.

It is not a weakly prime, because it can be changed into another prime (1222020216121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611010105060 + 611010105061.

It is an arithmetic number, because the mean of its divisors is an integer number (611010105061).

Almost surely, 2^{1222020210121} is an apocalyptic number.

It is an amenable number.

1222020210121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222020210121 is an equidigital number, since it uses as much as digits as its factorization.

1222020210121 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 1222020210121 its reverse (1210120202221), we get a palindrome (2432140412342).

The spelling of 1222020210121 in words is "one trillion, two hundred twenty-two billion, twenty million, two hundred ten thousand, one hundred twenty-one".