11021232123 has 72 divisors (see below), whose sum is σ = 18221308560. Its totient is φ = 6406646400.

The previous prime is 11021232121. The next prime is 11021232137. The reversal of 11021232123 is 32123212011.

11021232123 is a `hidden beast` number, since 110 + 212 + 321 + 23 = 666.

It is not a de Polignac number, because 11021232123 - 2¹ = 11021232121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11021232096 and 11021232105.

It is not an unprimeable number, because it can be changed into a prime (11021232121) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5146633 + ... + 5148773.

It is an arithmetic number, because the mean of its divisors is an integer number (253073730).

Almost surely, 2^11021232123 is an apocalyptic number.

11021232123 is a deficient number, since it is larger than the sum of its proper divisors (7200076437).

11021232123 is a wasteful number, since it uses less digits than its factorization.

11021232123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2361 (or 2347 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 11021232123 its reverse (32123212011), we get a palindrome (43144444134).

The spelling of 11021232123 in words is "eleven billion, twenty-one million, two hundred thirty-two thousand, one hundred twenty-three".