221220121011101 has 8 divisors (see below), whose sum is σ = 222443477858784. Its totient is φ = 219996776759760.

The previous prime is 221220121011083. The next prime is 221220121011103. The reversal of 221220121011101 is 101110121022122.

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 221220121011101 - 2³⁰ = 221219047269277 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 221220121011101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221220121011103) 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, 33231410 + ... + 39328956.

It is an arithmetic number, because the mean of its divisors is an integer number (27805434732348).

Almost surely, 2^{221220121011101} is an apocalyptic number.

It is an amenable number.

221220121011101 is a deficient number, since it is larger than the sum of its proper divisors (1223356847683).

221220121011101 is a wasteful number, since it uses less digits than its factorization.

221220121011101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6298171.

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

Adding to 221220121011101 its reverse (101110121022122), we get a palindrome (322330242033223).

The spelling of 221220121011101 in words is "two hundred twenty-one trillion, two hundred twenty billion, one hundred twenty-one million, eleven thousand, one hundred one".