78020022221012 has 12 divisors (see below), whose sum is σ = 141243143676180. Its totient is φ = 37664838313536.

The previous prime is 78020022220967. The next prime is 78020022221023. The reversal of 78020022221012 is 21012222002087.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 35164852560016 + 42855169660996 = 5929996^2 + 6546386^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336293199113 + ... + 336293199344.

It is an arithmetic number, because the mean of its divisors is an integer number (11770261973015).

Almost surely, 2^{78020022221012} is an apocalyptic number.

It is an amenable number.

78020022221012 is a deficient number, since it is larger than the sum of its proper divisors (63223121455168).

78020022221012 is a wasteful number, since it uses less digits than its factorization.

78020022221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672586398490 (or 672586398488 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 29.

Adding to 78020022221012 its reverse (21012222002087), we get a palindrome (99032244223099).

The spelling of 78020022221012 in words is "seventy-eight trillion, twenty billion, twenty-two million, two hundred twenty-one thousand, twelve".