221011021121201 has 16 divisors (see below), whose sum is σ = 235832447643840. Its totient is φ = 206508579114240.

The previous prime is 221011021121183. The next prime is 221011021121203. The reversal of 221011021121201 is 102121120110122.

It is not a de Polignac number, because 221011021121201 - 2¹⁴ = 221011021104817 is a prime.

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 221011021121201.

It is not an unprimeable number, because it can be changed into a prime (221011021121203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146776421 + ... + 148274541.

It is an arithmetic number, because the mean of its divisors is an integer number (14739527977740).

Almost surely, 2^{221011021121201} is an apocalyptic number.

It is an amenable number.

221011021121201 is a deficient number, since it is larger than the sum of its proper divisors (14821426522639).

221011021121201 is a wasteful number, since it uses less digits than its factorization.

221011021121201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1604576.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221011021121201 its reverse (102121120110122), we get a palindrome (323132141231323).

The spelling of 221011021121201 in words is "two hundred twenty-one trillion, eleven billion, twenty-one million, one hundred twenty-one thousand, two hundred one".