11000111221021 has 48 divisors (see below), whose sum is σ = 12676659758400. Its totient is φ = 9513687665664.

The previous prime is 11000111221009. The next prime is 11000111221037. The reversal of 11000111221021 is 12012211100011.

It is a happy number.

It is not a de Polignac number, because 11000111221021 - 2¹³ = 11000111212829 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11000111220992 and 11000111221010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11000111221081) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 191420725 + ... + 191478181.

It is an arithmetic number, because the mean of its divisors is an integer number (264097078300).

Almost surely, 2^{11000111221021} is an apocalyptic number.

It is an amenable number.

11000111221021 is a deficient number, since it is larger than the sum of its proper divisors (1676548537379).

11000111221021 is a wasteful number, since it uses less digits than its factorization.

11000111221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58158 (or 58145 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11000111221021 its reverse (12012211100011), we get a palindrome (23012322321032).

The spelling of 11000111221021 in words is "eleven trillion, one hundred eleven million, two hundred twenty-one thousand, twenty-one".