11233012021 has 128 divisors (see below), whose sum is σ = 16572211200. Its totient is φ = 7335567360.

The previous prime is 11233012009. The next prime is 11233012031. The reversal of 11233012021 is 12021033211.

It is not a de Polignac number, because 11233012021 - 2¹⁹ = 11232487733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11233011986 and 11233012004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11233012001) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 41758275 + ... + 41758543.

It is an arithmetic number, because the mean of its divisors is an integer number (129470400).

Almost surely, 2^11233012021 is an apocalyptic number.

11233012021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11233012021 is a deficient number, since it is larger than the sum of its proper divisors (5339199179).

11233012021 is a wasteful number, since it uses less digits than its factorization.

11233012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 11233012021 its reverse (12021033211), we get a palindrome (23254045232).

The spelling of 11233012021 in words is "eleven billion, two hundred thirty-three million, twelve thousand, twenty-one".