11501621213 has 8 divisors (see below), whose sum is σ = 11727193176. Its totient is φ = 11276366400.

The previous prime is 11501621203. The next prime is 11501621221. The reversal of 11501621213 is 31212610511.

It can be written as a sum of positive squares in 4 ways, for example, as 4738532569 + 6763088644 = 68837^2 + 82238^2 .

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-11501621213 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 (11501621203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5378 + ... + 151763.

It is an arithmetic number, because the mean of its divisors is an integer number (1465899147).

Almost surely, 2^11501621213 is an apocalyptic number.

It is an amenable number.

11501621213 is a deficient number, since it is larger than the sum of its proper divisors (225571963).

11501621213 is a wasteful number, since it uses less digits than its factorization.

11501621213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158575.

The product of its (nonzero) digits is 360, while the sum is 23.

The spelling of 11501621213 in words is "eleven billion, five hundred one million, six hundred twenty-one thousand, two hundred thirteen".