121312003531 has 8 divisors (see below), whose sum is σ = 123653834064. Its totient is φ = 118972133280.

The previous prime is 121312003523. The next prime is 121312003559. The reversal of 121312003531 is 135300213121.

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 121312003531 - 2³ = 121312003523 is a prime.

It is a super-2 number, since 2×121312003531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121312003591) 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, 364801 + ... + 612946.

It is an arithmetic number, because the mean of its divisors is an integer number (15456729258).

Almost surely, 2^121312003531 is an apocalyptic number.

121312003531 is a deficient number, since it is larger than the sum of its proper divisors (2341830533).

121312003531 is an equidigital number, since it uses as much as digits as its factorization.

121312003531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980141.

The product of its (nonzero) digits is 540, while the sum is 22.

Adding to 121312003531 its reverse (135300213121), we get a palindrome (256612216652).

The spelling of 121312003531 in words is "one hundred twenty-one billion, three hundred twelve million, three thousand, five hundred thirty-one".