87116322021 has 16 divisors (see below), whose sum is σ = 117940981248. Its totient is φ = 57186687600.

The previous prime is 87116322019. The next prime is 87116322023. The reversal of 87116322021 is 12022361178.

It is an interprime number because it is at equal distance from previous prime (87116322019) and next prime (87116322023).

It is not a de Polignac number, because 87116322021 - 2¹ = 87116322019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87116322023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92215 + ... + 427476.

It is an arithmetic number, because the mean of its divisors is an integer number (7371311328).

Almost surely, 2^87116322021 is an apocalyptic number.

It is an amenable number.

87116322021 is a deficient number, since it is larger than the sum of its proper divisors (30824659227).

87116322021 is a wasteful number, since it uses less digits than its factorization.

87116322021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520552.

The product of its (nonzero) digits is 8064, while the sum is 33.

Adding to 87116322021 its reverse (12022361178), we get a palindrome (99138683199).

The spelling of 87116322021 in words is "eighty-seven billion, one hundred sixteen million, three hundred twenty-two thousand, twenty-one".