221056621206011 has 8 divisors (see below), whose sum is σ = 229506482734464. Its totient is φ = 212689197351360.

The previous prime is 221056621205999. The next prime is 221056621206049. The reversal of 221056621206011 is 110602126650122.

221056621206011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 221056621206011 - 2²⁶ = 221056554097147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221056621206611) 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, 20609412986 + ... + 20609423711.

It is an arithmetic number, because the mean of its divisors is an integer number (28688310341808).

Almost surely, 2^{221056621206011} is an apocalyptic number.

221056621206011 is a deficient number, since it is larger than the sum of its proper divisors (8449861528453).

221056621206011 is a wasteful number, since it uses less digits than its factorization.

221056621206011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41218836901.

The product of its (nonzero) digits is 17280, while the sum is 35.

Adding to 221056621206011 its reverse (110602126650122), we get a palindrome (331658747856133).

The spelling of 221056621206011 in words is "two hundred twenty-one trillion, fifty-six billion, six hundred twenty-one million, two hundred six thousand, eleven".