11921144513 has 8 divisors (see below), whose sum is σ = 12440953728. Its totient is φ = 11401460224.

The previous prime is 11921144507. The next prime is 11921144563. The reversal of 11921144513 is 31544112911.

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 11921144513 - 2⁴ = 11921144497 is a prime.

It is a super-2 number, since 2×11921144513² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11921144513.

It is not an unprimeable number, because it can be changed into a prime (11921144563) 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, 200420 + ... + 253002.

It is an arithmetic number, because the mean of its divisors is an integer number (1555119216).

Almost surely, 2^11921144513 is an apocalyptic number.

It is an amenable number.

11921144513 is a deficient number, since it is larger than the sum of its proper divisors (519809215).

11921144513 is an equidigital number, since it uses as much as digits as its factorization.

11921144513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62463.

The product of its digits is 4320, while the sum is 32.

The spelling of 11921144513 in words is "eleven billion, nine hundred twenty-one million, one hundred forty-four thousand, five hundred thirteen".