1202220221021 has 2 divisors, whose sum is σ = 1202220221022. Its totient is φ = 1202220221020.

The previous prime is 1202220221003. The next prime is 1202220221051. The reversal of 1202220221021 is 1201220222021.

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., 1137571564900 + 64648656121 = 1066570^2 + 254261^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202220221021 - 2¹⁴ = 1202220204637 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1202220221051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601110110510 + 601110110511.

It is an arithmetic number, because the mean of its divisors is an integer number (601110110511).

Almost surely, 2^{1202220221021} is an apocalyptic number.

It is an amenable number.

1202220221021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202220221021 is an equidigital number, since it uses as much as digits as its factorization.

1202220221021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1202220221021 its reverse (1201220222021), we get a palindrome (2403440443042).

It can be divided in two parts, 1202220 and 221021, that added together give a palindrome (1423241).

The spelling of 1202220221021 in words is "one trillion, two hundred two billion, two hundred twenty million, two hundred twenty-one thousand, twenty-one".