1121521061 has 2 divisors, whose sum is σ = 1121521062. Its totient is φ = 1121521060.

The previous prime is 1121521057. The next prime is 1121521073. The reversal of 1121521061 is 1601251211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 961372036 + 160149025 = 31006^2 + 12655^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121521061 - 2² = 1121521057 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121521001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560760530 + 560760531.

It is an arithmetic number, because the mean of its divisors is an integer number (560760531).

Almost surely, 2^1121521061 is an apocalyptic number.

It is an amenable number.

1121521061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121521061 is an equidigital number, since it uses as much as digits as its factorization.

1121521061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 20.

The square root of 1121521061 is about 33489.1185461785. The cubic root of 1121521061 is about 1038.9687327227.

Adding to 1121521061 its reverse (1601251211), we get a palindrome (2722772272).

The spelling of 1121521061 in words is "one billion, one hundred twenty-one million, five hundred twenty-one thousand, sixty-one".