78201021011233 has 2 divisors, whose sum is σ = 78201021011234. Its totient is φ = 78201021011232.

The previous prime is 78201021011173. The next prime is 78201021011317. The reversal of 78201021011233 is 33211012010287.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56798711666064 + 21402309345169 = 7536492^2 + 4626263^2 .

It is an emirp because it is prime and its reverse (33211012010287) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78201021011233 - 2³⁷ = 78063582057761 is a prime.

It is a super-2 number, since 2×78201021011233² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78201021011195 and 78201021011204.

It is not a weakly prime, because it can be changed into another prime (78201021011833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39100510505616 + 39100510505617.

It is an arithmetic number, because the mean of its divisors is an integer number (39100510505617).

Almost surely, 2^{78201021011233} is an apocalyptic number.

It is an amenable number.

78201021011233 is a deficient number, since it is larger than the sum of its proper divisors (1).

78201021011233 is an equidigital number, since it uses as much as digits as its factorization.

78201021011233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 31.

The spelling of 78201021011233 in words is "seventy-eight trillion, two hundred one billion, twenty-one million, eleven thousand, two hundred thirty-three".