781202202222212 has 6 divisors (see below), whose sum is σ = 1367103853888878. Its totient is φ = 390601101111104.

The previous prime is 781202202222203. The next prime is 781202202222217. The reversal of 781202202222212 is 212222202202187.

It can be written as a sum of positive squares in only one way, i.e., 655368908830276 + 125833293391936 = 25600174^2 + 11217544^2 .

It is a super-2 number, since 2×781202202222212² (a number of 31 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (781202202222217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97650275277773 + ... + 97650275277780.

It is an arithmetic number, because the mean of its divisors is an integer number (227850642314813).

Almost surely, 2^{781202202222212} is an apocalyptic number.

It is an amenable number.

781202202222212 is a deficient number, since it is larger than the sum of its proper divisors (585901651666666).

781202202222212 is a wasteful number, since it uses less digits than its factorization.

781202202222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195300550555557 (or 195300550555555 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 35.

Adding to 781202202222212 its reverse (212222202202187), we get a palindrome (993424404424399).

The spelling of 781202202222212 in words is "seven hundred eighty-one trillion, two hundred two billion, two hundred two million, two hundred twenty-two thousand, two hundred twelve".