11221321001 has 16 divisors (see below), whose sum is σ = 12444055488. Its totient is φ = 10032844800.

The previous prime is 11221320989. The next prime is 11221321073. The reversal of 11221321001 is 10012312211.

It is not a de Polignac number, because 11221321001 - 2¹⁴ = 11221304617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11221321091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 460541 + ... + 484293.

It is an arithmetic number, because the mean of its divisors is an integer number (777753468).

Almost surely, 2^11221321001 is an apocalyptic number.

11221321001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11221321001 is a deficient number, since it is larger than the sum of its proper divisors (1222734487).

11221321001 is a wasteful number, since it uses less digits than its factorization.

11221321001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24472.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 11221321001 its reverse (10012312211), we get a palindrome (21233633212).

The spelling of 11221321001 in words is "eleven billion, two hundred twenty-one million, three hundred twenty-one thousand, one".