1152170061221 has 2 divisors, whose sum is σ = 1152170061222. Its totient is φ = 1152170061220.

The previous prime is 1152170061199. The next prime is 1152170061271. The reversal of 1152170061221 is 1221600712511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 684738045121 + 467432016100 = 827489^2 + 683690^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1152170061221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1152170061271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 576085030610 + 576085030611.

It is an arithmetic number, because the mean of its divisors is an integer number (576085030611).

Almost surely, 2^{1152170061221} is an apocalyptic number.

It is an amenable number.

1152170061221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1152170061221 is an equidigital number, since it uses as much as digits as its factorization.

1152170061221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 29.

Adding to 1152170061221 its reverse (1221600712511), we get a palindrome (2373770773732).

The spelling of 1152170061221 in words is "one trillion, one hundred fifty-two billion, one hundred seventy million, sixty-one thousand, two hundred twenty-one".