87570901021 has 4 divisors (see below), whose sum is σ = 88010956000. Its totient is φ = 87130846044.

The previous prime is 87570900979. The next prime is 87570901057. The reversal of 87570901021 is 12010907578.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87570901021 - 2¹¹ = 87570898973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87570901081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220027191 + ... + 220027588.

It is an arithmetic number, because the mean of its divisors is an integer number (22002739000).

Almost surely, 2^87570901021 is an apocalyptic number.

It is an amenable number.

87570901021 is a deficient number, since it is larger than the sum of its proper divisors (440054979).

87570901021 is a wasteful number, since it uses less digits than its factorization.

87570901021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440054978.

The product of its (nonzero) digits is 35280, while the sum is 40.

The spelling of 87570901021 in words is "eighty-seven billion, five hundred seventy million, nine hundred one thousand, twenty-one".