1012202220521 has 2 divisors, whose sum is σ = 1012202220522. Its totient is φ = 1012202220520.

The previous prime is 1012202220511. The next prime is 1012202220551. The reversal of 1012202220521 is 1250222022101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 873970698496 + 138231522025 = 934864^2 + 371795^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012202220521 - 2³⁰ = 1011128478697 is a prime.

It is a super-2 number, since 2×1012202220521² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1012202220493 and 1012202220502.

It is not a weakly prime, because it can be changed into another prime (1012202220511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506101110260 + 506101110261.

It is an arithmetic number, because the mean of its divisors is an integer number (506101110261).

Almost surely, 2^{1012202220521} is an apocalyptic number.

It is an amenable number.

1012202220521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012202220521 is an equidigital number, since it uses as much as digits as its factorization.

1012202220521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 1012202220521 its reverse (1250222022101), we get a palindrome (2262424242622).

The spelling of 1012202220521 in words is "one trillion, twelve billion, two hundred two million, two hundred twenty thousand, five hundred twenty-one".