87012111121078 has 64 divisors (see below), whose sum is σ = 156571099820352. Its totient is φ = 35745623930880.

The previous prime is 87012111121051. The next prime is 87012111121081.

87012111121078 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×87012111121078² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 87012111121078.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12350101 + ... + 18070672.

It is an arithmetic number, because the mean of its divisors is an integer number (2446423434693).

Almost surely, 2^{87012111121078} is an apocalyptic number.

87012111121078 is a deficient number, since it is larger than the sum of its proper divisors (69558988699274).

87012111121078 is a wasteful number, since it uses less digits than its factorization.

87012111121078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30421009.

The product of its (nonzero) digits is 12544, while the sum is 40.

It can be divided in two parts, 8701211 and 1121078, that added together give a palindrome (9822289).

The spelling of 87012111121078 in words is "eighty-seven trillion, twelve billion, one hundred eleven million, one hundred twenty-one thousand, seventy-eight".