101221111222211 has 4 divisors (see below), whose sum is σ = 101390094714000. Its totient is φ = 101052127730424.

The previous prime is 101221111222141. The next prime is 101221111222243. The reversal of 101221111222211 is 112222111122101.

It is a happy number.

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 101221111222211 - 2²² = 101221107027907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101221111222261) 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, 84491744996 + ... + 84491746193.

It is an arithmetic number, because the mean of its divisors is an integer number (25347523678500).

Almost surely, 2^{101221111222211} is an apocalyptic number.

101221111222211 is a deficient number, since it is larger than the sum of its proper divisors (168983491789).

101221111222211 is an equidigital number, since it uses as much as digits as its factorization.

101221111222211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168983491788.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 101221111222211 its reverse (112222111122101), we get a palindrome (213443222344312).

The spelling of 101221111222211 in words is "one hundred one trillion, two hundred twenty-one billion, one hundred eleven million, two hundred twenty-two thousand, two hundred eleven".