11001102021 has 32 divisors (see below), whose sum is σ = 20058993920. Its totient is φ = 5802777792.

The previous prime is 11001101987. The next prime is 11001102037. The reversal of 11001102021 is 12020110011.

It is a happy number.

It is not a de Polignac number, because 11001102021 - 2⁶ = 11001101957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 11001101994 and 11001102012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11001102221) 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, 2236270 + ... + 2241183.

It is an arithmetic number, because the mean of its divisors is an integer number (626843560).

Almost surely, 2^11001102021 is an apocalyptic number.

It is an amenable number.

11001102021 is a deficient number, since it is larger than the sum of its proper divisors (9057891899).

11001102021 is a wasteful number, since it uses less digits than its factorization.

11001102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4477482 (or 4477476 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 11001102021 its reverse (12020110011), we get a palindrome (23021212032).

The spelling of 11001102021 in words is "eleven billion, one million, one hundred two thousand, twenty-one".