221020121222211 has 8 divisors (see below), whose sum is σ = 299688299962560. Its totient is φ = 144849344981672.

The previous prime is 221020121222191. The next prime is 221020121222231. The reversal of 221020121222211 is 112222121020122.

It is an interprime number because it is at equal distance from previous prime (221020121222191) and next prime (221020121222231).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221020121222211 - 2⁵ = 221020121222179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221020121222231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 624350624745 + ... + 624350625098.

It is an arithmetic number, because the mean of its divisors is an integer number (37461037495320).

Almost surely, 2^{221020121222211} is an apocalyptic number.

221020121222211 is a deficient number, since it is larger than the sum of its proper divisors (78668178740349).

221020121222211 is a wasteful number, since it uses less digits than its factorization.

221020121222211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248701249905.

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

Adding to 221020121222211 its reverse (112222121020122), we get a palindrome (333242242242333).

The spelling of 221020121222211 in words is "two hundred twenty-one trillion, twenty billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred eleven".