87990111021121 has 8 divisors (see below), whose sum is σ = 91067618376000. Its totient is φ = 84915494706000.

The previous prime is 87990111021031. The next prime is 87990111021151. The reversal of 87990111021121 is 12112011109978.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87990111021121 - 2¹¹ = 87990111019073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87990111021151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 722698005 + ... + 722819746.

It is an arithmetic number, because the mean of its divisors is an integer number (11383452297000).

Almost surely, 2^{87990111021121} is an apocalyptic number.

It is an amenable number.

87990111021121 is a deficient number, since it is larger than the sum of its proper divisors (3077507354879).

87990111021121 is a wasteful number, since it uses less digits than its factorization.

87990111021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1445519879.

The product of its (nonzero) digits is 18144, while the sum is 43.

The spelling of 87990111021121 in words is "eighty-seven trillion, nine hundred ninety billion, one hundred eleven million, twenty-one thousand, one hundred twenty-one".