11145131021 has 8 divisors (see below), whose sum is σ = 11384833824. Its totient is φ = 10907938480.

The previous prime is 11145130991. The next prime is 11145131047. The reversal of 11145131021 is 12013154111.

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 11145131021 - 2⁶ = 11145130957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11145130984 and 11145131002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11145131071) 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, 618590 + ... + 636351.

It is an arithmetic number, because the mean of its divisors is an integer number (1423104228).

Almost surely, 2^11145131021 is an apocalyptic number.

It is an amenable number.

11145131021 is a deficient number, since it is larger than the sum of its proper divisors (239702803).

11145131021 is a wasteful number, since it uses less digits than its factorization.

11145131021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255131.

The product of its (nonzero) digits is 120, while the sum is 20.

Adding to 11145131021 its reverse (12013154111), we get a palindrome (23158285132).

The spelling of 11145131021 in words is "eleven billion, one hundred forty-five million, one hundred thirty-one thousand, twenty-one".