11403421015505 has 16 divisors (see below), whose sum is σ = 13958193882384. Its totient is φ = 8940403580160.

The previous prime is 11403421015501. The next prime is 11403421015507. The reversal of 11403421015505 is 50551012430411.

It can be written as a sum of positive squares in 8 ways, for example, as 3193826488384 + 8209594527121 = 1787128^2 + 2865239^2 .

It is not a de Polignac number, because 11403421015505 - 2² = 11403421015501 is a prime.

It is a super-2 number, since 2×11403421015505² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11403421015501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24301106 + ... + 24765915.

It is an arithmetic number, because the mean of its divisors is an integer number (872387117649).

Almost surely, 2^{11403421015505} is an apocalyptic number.

It is an amenable number.

11403421015505 is a deficient number, since it is larger than the sum of its proper divisors (2554772866879).

11403421015505 is an equidigital number, since it uses as much as digits as its factorization.

11403421015505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49067956.

The product of its (nonzero) digits is 12000, while the sum is 32.

Adding to 11403421015505 its reverse (50551012430411), we get a palindrome (61954433445916).

The spelling of 11403421015505 in words is "eleven trillion, four hundred three billion, four hundred twenty-one million, fifteen thousand, five hundred five".