11221212001001 has 4 divisors (see below), whose sum is σ = 11263878206592. Its totient is φ = 11178545795412.

The previous prime is 11221212000989. The next prime is 11221212001007. The reversal of 11221212001001 is 10010021212211.

11221212001001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11221212001001 - 2⁶ = 11221212000937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11221212001007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21333102401 + ... + 21333102926.

It is an arithmetic number, because the mean of its divisors is an integer number (2815969551648).

Almost surely, 2^{11221212001001} is an apocalyptic number.

It is an amenable number.

11221212001001 is a deficient number, since it is larger than the sum of its proper divisors (42666205591).

11221212001001 is an equidigital number, since it uses as much as digits as its factorization.

11221212001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42666205590.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11221212001001 its reverse (10010021212211), we get a palindrome (21231233213212).

The spelling of 11221212001001 in words is "eleven trillion, two hundred twenty-one billion, two hundred twelve million, one thousand, one".