11211100222001 has 4 divisors (see below), whose sum is σ = 11698539362112. Its totient is φ = 10723661081892.

The previous prime is 11211100221977. The next prime is 11211100222009. The reversal of 11211100222001 is 10022200111211.

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 11211100222001 - 2³⁴ = 11193920352817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11211100222009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243719570021 + ... + 243719570066.

It is an arithmetic number, because the mean of its divisors is an integer number (2924634840528).

Almost surely, 2^{11211100222001} is an apocalyptic number.

It is an amenable number.

11211100222001 is a deficient number, since it is larger than the sum of its proper divisors (487439140111).

11211100222001 is an equidigital number, since it uses as much as digits as its factorization.

11211100222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487439140110.

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

Adding to 11211100222001 its reverse (10022200111211), we get a palindrome (21233300333212).

It can be divided in two parts, 11211 and 100222001, that multiplied together give a palindrome (1123588853211).

The spelling of 11211100222001 in words is "eleven trillion, two hundred eleven billion, one hundred million, two hundred twenty-two thousand, one".