221012221201211 has 4 divisors (see below), whose sum is σ = 241104241310424. Its totient is φ = 200920201092000.

The previous prime is 221012221201201. The next prime is 221012221201223. The reversal of 221012221201211 is 112102122210122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221012221201211 - 2⁶ = 221012221201147 is a prime.

It is a super-3 number, since 3×221012221201211³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221012221201201) 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, 10046010054590 + ... + 10046010054611.

It is an arithmetic number, because the mean of its divisors is an integer number (60276060327606).

Almost surely, 2^{221012221201211} is an apocalyptic number.

221012221201211 is a deficient number, since it is larger than the sum of its proper divisors (20092020109213).

221012221201211 is a wasteful number, since it uses less digits than its factorization.

221012221201211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20092020109212.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 221012221201211 its reverse (112102122210122), we get a palindrome (333114343411333).

The spelling of 221012221201211 in words is "two hundred twenty-one trillion, twelve billion, two hundred twenty-one million, two hundred one thousand, two hundred eleven".