11503146021 has 4 divisors (see below), whose sum is σ = 15337528032. Its totient is φ = 7668764012.

The previous prime is 11503146007. The next prime is 11503146029. The reversal of 11503146021 is 12064130511.

It is a happy number.

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 11503146021 - 2¹⁵ = 11503113253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11503145982 and 11503146000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11503146029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1917191001 + ... + 1917191006.

It is an arithmetic number, because the mean of its divisors is an integer number (3834382008).

Almost surely, 2^11503146021 is an apocalyptic number.

It is an amenable number.

11503146021 is a deficient number, since it is larger than the sum of its proper divisors (3834382011).

11503146021 is an equidigital number, since it uses as much as digits as its factorization.

11503146021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3834382010.

The product of its (nonzero) digits is 720, while the sum is 24.

Adding to 11503146021 its reverse (12064130511), we get a palindrome (23567276532).

The spelling of 11503146021 in words is "eleven billion, five hundred three million, one hundred forty-six thousand, twenty-one".