1121222001521 has 2 divisors, whose sum is σ = 1121222001522. Its totient is φ = 1121222001520.

The previous prime is 1121222001503. The next prime is 1121222001541. The reversal of 1121222001521 is 1251002221211.

It is an a-pointer prime, because the next prime (1121222001541) can be obtained adding 1121222001521 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 986873362225 + 134348639296 = 993415^2 + 366536^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121222001521 - 2²⁶ = 1121154892657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1121222001493 and 1121222001502.

It is not a weakly prime, because it can be changed into another prime (1121222001541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560611000760 + 560611000761.

It is an arithmetic number, because the mean of its divisors is an integer number (560611000761).

Almost surely, 2^{1121222001521} is an apocalyptic number.

It is an amenable number.

1121222001521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121222001521 is an equidigital number, since it uses as much as digits as its factorization.

1121222001521 is an evil number, because the sum of its binary digits is even.

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

Adding to 1121222001521 its reverse (1251002221211), we get a palindrome (2372224222732).

The spelling of 1121222001521 in words is "one trillion, one hundred twenty-one billion, two hundred twenty-two million, one thousand, five hundred twenty-one".