10721232990509 has 4 divisors (see below), whose sum is σ = 10729361295840. Its totient is φ = 10713104685180.

The previous prime is 10721232990473. The next prime is 10721232990511. The reversal of 10721232990509 is 90509923212701.

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 10721232990509 - 2²⁰ = 10721231941933 is a prime.

It is a super-2 number, since 2×10721232990509² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10721232990109) 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 3 ways as a sum of consecutive naturals, for example, 4064150687 + ... + 4064153324.

It is an arithmetic number, because the mean of its divisors is an integer number (2682340323960).

Almost surely, 2^{10721232990509} is an apocalyptic number.

It is an amenable number.

10721232990509 is a deficient number, since it is larger than the sum of its proper divisors (8128305331).

10721232990509 is an equidigital number, since it uses as much as digits as its factorization.

10721232990509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8128305330.

The product of its (nonzero) digits is 612360, while the sum is 50.

The spelling of 10721232990509 in words is "ten trillion, seven hundred twenty-one billion, two hundred thirty-two million, nine hundred ninety thousand, five hundred nine".