10121531 has 8 divisors (see below), whose sum is σ = 11940864. Its totient is φ = 8395560.

The previous prime is 10121521. The next prime is 10121533. The reversal of 10121531 is 13512101.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10121531 is a prime.

It is a super-3 number, since 3×10121531³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10121533) 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, 23105 + ... + 23538.

It is an arithmetic number, because the mean of its divisors is an integer number (1492608).

Almost surely, 2^10121531 is an apocalyptic number.

10121531 is a deficient number, since it is larger than the sum of its proper divisors (1819333).

10121531 is an equidigital number, since it uses as much as digits as its factorization.

10121531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46681.

The product of its (nonzero) digits is 30, while the sum is 14.

The square root of 10121531 is about 3181.4353678804. The cubic root of 10121531 is about 216.3127257424.

Adding to 10121531 its reverse (13512101), we get a palindrome (23633632).

The spelling of 10121531 in words is "ten million, one hundred twenty-one thousand, five hundred thirty-one".