221020021012211 has 8 divisors (see below), whose sum is σ = 221229757875024. Its totient is φ = 220810286833120.

The previous prime is 221020021012171. The next prime is 221020021012213. The reversal of 221020021012211 is 112210120020122.

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 221020021012211 - 2⁴⁶ = 150651276834547 is a prime.

It is a super-2 number, since 2×221020021012211² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221020021012211.

It is not an unprimeable number, because it can be changed into a prime (221020021012213) 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, 189717056 + ... + 190878498.

It is an arithmetic number, because the mean of its divisors is an integer number (27653719734378).

Almost surely, 2^{221020021012211} is an apocalyptic number.

221020021012211 is a deficient number, since it is larger than the sum of its proper divisors (209736862813).

221020021012211 is a wasteful number, since it uses less digits than its factorization.

221020021012211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341861.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221020021012211 its reverse (112210120020122), we get a palindrome (333230141032333).

The spelling of 221020021012211 in words is "two hundred twenty-one trillion, twenty billion, twenty-one million, twelve thousand, two hundred eleven".