87012222221078 has 96 divisors (see below), whose sum is σ = 165107621790720. Its totient is φ = 33410857052160.

The previous prime is 87012222221077. The next prime is 87012222221083.

87012222221078 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×87012222221078² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87012222221077) 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 in 47 ways as a sum of consecutive naturals, for example, 346182026 + ... + 346433282.

It is an arithmetic number, because the mean of its divisors is an integer number (1719871060320).

Almost surely, 2^{87012222221078} is an apocalyptic number.

87012222221078 is a deficient number, since it is larger than the sum of its proper divisors (78095399569642).

87012222221078 is a wasteful number, since it uses less digits than its factorization.

87012222221078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251710 (or 251613 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 44.

The spelling of 87012222221078 in words is "eighty-seven trillion, twelve billion, two hundred twenty-two million, two hundred twenty-one thousand, seventy-eight".