11403131021 has 8 divisors (see below), whose sum is σ = 12162036600. Its totient is φ = 10654018048.

The previous prime is 11403130993. The next prime is 11403131053. The reversal of 11403131021 is 12013130411.

It can be written as a sum of positive squares in 4 ways, for example, as 4327797796 + 7075333225 = 65786^2 + 84115^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11403131021 - 2¹⁴ = 11403114637 is a prime.

It is a super-3 number, since 3×11403131021³ (a number of 31 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11403131071) 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, 2445746 + ... + 2450403.

It is an arithmetic number, because the mean of its divisors is an integer number (1520254575).

Almost surely, 2^11403131021 is an apocalyptic number.

It is an amenable number.

11403131021 is a deficient number, since it is larger than the sum of its proper divisors (758905579).

11403131021 is a wasteful number, since it uses less digits than its factorization.

11403131021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4896303.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 11403131021 its reverse (12013130411), we get a palindrome (23416261432).

The spelling of 11403131021 in words is "eleven billion, four hundred three million, one hundred thirty-one thousand, twenty-one".