11221210001001 has 128 divisors (see below), whose sum is σ = 20639582724096. Its totient is φ = 5233257953280.

The previous prime is 11221210000981. The next prime is 11221210001017. The reversal of 11221210001001 is 10010001212211.

It is not a de Polignac number, because 11221210001001 - 2⁶ = 11221210000937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11221210041001) 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, 294091741 + ... + 294129893.

It is an arithmetic number, because the mean of its divisors is an integer number (161246740032).

Almost surely, 2^{11221210001001} is an apocalyptic number.

11221210001001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11221210001001 is a deficient number, since it is larger than the sum of its proper divisors (9418372723095).

11221210001001 is a wasteful number, since it uses less digits than its factorization.

11221210001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40871.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11221210001001 its reverse (10010001212211), we get a palindrome (21231211213212).

The spelling of 11221210001001 in words is "eleven trillion, two hundred twenty-one billion, two hundred ten million, one thousand, one".