84152901221 has 2 divisors, whose sum is σ = 84152901222. Its totient is φ = 84152901220.

The previous prime is 84152901199. The next prime is 84152901233. The reversal of 84152901221 is 12210925148.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67740472900 + 16412428321 = 260270^2 + 128111^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84152901221 is a prime.

It is a super-2 number, since 2×84152901221² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84151901221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42076450610 + 42076450611.

It is an arithmetic number, because the mean of its divisors is an integer number (42076450611).

Almost surely, 2^84152901221 is an apocalyptic number.

It is an amenable number.

84152901221 is a deficient number, since it is larger than the sum of its proper divisors (1).

84152901221 is an equidigital number, since it uses as much as digits as its factorization.

84152901221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 35.

The spelling of 84152901221 in words is "eighty-four billion, one hundred fifty-two million, nine hundred one thousand, two hundred twenty-one".