11021021221222 has 4 divisors (see below), whose sum is σ = 16531531831836. Its totient is φ = 5510510610610.

The previous prime is 11021021221127. The next prime is 11021021221247. The reversal of 11021021221222 is 22212212012011.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 11021021221222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2755255305304 + ... + 2755255305307.

It is an arithmetic number, because the mean of its divisors is an integer number (4132882957959).

Almost surely, 2^{11021021221222} is an apocalyptic number.

11021021221222 is a deficient number, since it is larger than the sum of its proper divisors (5510510610614).

11021021221222 is an equidigital number, since it uses as much as digits as its factorization.

11021021221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5510510610613.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 11021021221222 its reverse (22212212012011), we get a palindrome (33233233233233).

The spelling of 11021021221222 in words is "eleven trillion, twenty-one billion, twenty-one million, two hundred twenty-one thousand, two hundred twenty-two".