11212122222201 has 4 divisors (see below), whose sum is σ = 14949496296272. Its totient is φ = 7474748148132.

The previous prime is 11212122222179. The next prime is 11212122222227. The reversal of 11212122222201 is 10222222121211.

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 not a de Polignac number, because 11212122222201 - 2¹⁹ = 11212121697913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11212122222901) 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, 1868687037031 + ... + 1868687037036.

It is an arithmetic number, because the mean of its divisors is an integer number (3737374074068).

Almost surely, 2^{11212122222201} is an apocalyptic number.

It is an amenable number.

11212122222201 is a deficient number, since it is larger than the sum of its proper divisors (3737374074071).

11212122222201 is an equidigital number, since it uses as much as digits as its factorization.

11212122222201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3737374074070.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 11212122222201 its reverse (10222222121211), we get a palindrome (21434344343412).

The spelling of 11212122222201 in words is "eleven trillion, two hundred twelve billion, one hundred twenty-two million, two hundred twenty-two thousand, two hundred one".