11211321023 has 16 divisors (see below), whose sum is σ = 12887069184. Its totient is φ = 9554176800.

The previous prime is 11211321001. The next prime is 11211321047. The reversal of 11211321023 is 32012311211.

It is a de Polignac number, because none of the positive numbers 2^k-11211321023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11211320992 and 11211321010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211321083) 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, 3516236 + ... + 3519422.

It is an arithmetic number, because the mean of its divisors is an integer number (805441824).

Almost surely, 2^11211321023 is an apocalyptic number.

11211321023 is a deficient number, since it is larger than the sum of its proper divisors (1675748161).

11211321023 is a wasteful number, since it uses less digits than its factorization.

11211321023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5942.

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

Adding to 11211321023 its reverse (32012311211), we get a palindrome (43223632234).

The spelling of 11211321023 in words is "eleven billion, two hundred eleven million, three hundred twenty-one thousand, twenty-three".