87201121 has 16 divisors (see below), whose sum is σ = 102629376. Its totient is φ = 72542736.

The previous prime is 87201113. The next prime is 87201131. The reversal of 87201121 is 12110278.

It is not a de Polignac number, because 87201121 - 2³ = 87201113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87201092 and 87201101.

It is not an unprimeable number, because it can be changed into a prime (87201131) 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, 40740 + ... + 42826.

It is an arithmetic number, because the mean of its divisors is an integer number (6414336).

Almost surely, 2^87201121 is an apocalyptic number.

It is an amenable number.

87201121 is a deficient number, since it is larger than the sum of its proper divisors (15428255).

87201121 is a wasteful number, since it uses less digits than its factorization.

87201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2268.

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 87201121 is about 9338.1540467054. The cubic root of 87201121 is about 443.4459464175.

Adding to 87201121 its reverse (12110278), we get a palindrome (99311399).

The spelling of 87201121 in words is "eighty-seven million, two hundred one thousand, one hundred twenty-one".