11021331123 has 32 divisors (see below), whose sum is σ = 17876689920. Its totient is φ = 6655430880.

The previous prime is 11021331089. The next prime is 11021331133. The reversal of 11021331123 is 32113312011.

It is not a de Polignac number, because 11021331123 - 2⁶ = 11021331059 is a prime.

It is a super-2 number, since 2×11021331123² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11021331096 and 11021331105.

It is not an unprimeable number, because it can be changed into a prime (11021331133) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15286 + ... + 149252.

It is an arithmetic number, because the mean of its divisors is an integer number (558646560).

Almost surely, 2^11021331123 is an apocalyptic number.

11021331123 is a deficient number, since it is larger than the sum of its proper divisors (6855358797).

11021331123 is a wasteful number, since it uses less digits than its factorization.

11021331123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134264 (or 134258 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 11021331123 its reverse (32113312011), we get a palindrome (43134643134).

The spelling of 11021331123 in words is "eleven billion, twenty-one million, three hundred thirty-one thousand, one hundred twenty-three".