11211021123 has 16 divisors (see below), whose sum is σ = 15701254656. Its totient is φ = 7101705600.

The previous prime is 11211021119. The next prime is 11211021131. The reversal of 11211021123 is 32112011211.

11211021123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11211021123 - 2² = 11211021119 is a prime.

It is a super-2 number, since 2×11211021123² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11211021163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 527590 + ... + 548427.

It is an arithmetic number, because the mean of its divisors is an integer number (981328416).

Almost surely, 2^11211021123 is an apocalyptic number.

11211021123 is a deficient number, since it is larger than the sum of its proper divisors (4490233533).

11211021123 is a wasteful number, since it uses less digits than its factorization.

11211021123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076194.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 11211021123 its reverse (32112011211), we get a palindrome (43323032334).

The spelling of 11211021123 in words is "eleven billion, two hundred eleven million, twenty-one thousand, one hundred twenty-three".