1022111022521 has 2 divisors, whose sum is σ = 1022111022522. Its totient is φ = 1022111022520.

The previous prime is 1022111022463. The next prime is 1022111022529. The reversal of 1022111022521 is 1252201112201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1022110890025 + 132496 = 1010995^2 + 364^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1022111022521 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1022111022493 and 1022111022502.

It is not a weakly prime, because it can be changed into another prime (1022111022529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511055511260 + 511055511261.

It is an arithmetic number, because the mean of its divisors is an integer number (511055511261).

Almost surely, 2^{1022111022521} is an apocalyptic number.

It is an amenable number.

1022111022521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022111022521 is an equidigital number, since it uses as much as digits as its factorization.

1022111022521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 20.

Adding to 1022111022521 its reverse (1252201112201), we get a palindrome (2274312134722).

The spelling of 1022111022521 in words is "one trillion, twenty-two billion, one hundred eleven million, twenty-two thousand, five hundred twenty-one".