1202202010021 has 2 divisors, whose sum is σ = 1202202010022. Its totient is φ = 1202202010020.

The previous prime is 1202202010013. The next prime is 1202202010147. The reversal of 1202202010021 is 1200102022021.

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., 825499444900 + 376702565121 = 908570^2 + 613761^2 .

It is a cyclic number.

It is not a de Polignac number, because 1202202010021 - 2³ = 1202202010013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1202202009983 and 1202202010010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1202202410021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601101005010 + 601101005011.

It is an arithmetic number, because the mean of its divisors is an integer number (601101005011).

Almost surely, 2^{1202202010021} is an apocalyptic number.

It is an amenable number.

1202202010021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202202010021 is an equidigital number, since it uses as much as digits as its factorization.

1202202010021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1202202010021 its reverse (1200102022021), we get a palindrome (2402304032042).

The spelling of 1202202010021 in words is "one trillion, two hundred two billion, two hundred two million, ten thousand, twenty-one".