102521131 has 8 divisors (see below), whose sum is σ = 108769280. Its totient is φ = 96358248.

The previous prime is 102521113. The next prime is 102521141. The reversal of 102521131 is 131125201.

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 102521131 - 2¹⁵ = 102488363 is a prime.

It is a super-2 number, since 2×102521131² = 21021164603038322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102521141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18831 + ... + 23656.

It is an arithmetic number, because the mean of its divisors is an integer number (13596160).

Almost surely, 2^102521131 is an apocalyptic number.

102521131 is a deficient number, since it is larger than the sum of its proper divisors (6248149).

102521131 is a wasteful number, since it uses less digits than its factorization.

102521131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42633.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 102521131 is about 10125.2718975838. The cubic root of 102521131 is about 468.0272389605.

Adding to 102521131 its reverse (131125201), we get a palindrome (233646332).

The spelling of 102521131 in words is "one hundred two million, five hundred twenty-one thousand, one hundred thirty-one".