121011100201221 has 4 divisors (see below), whose sum is σ = 161348133601632. Its totient is φ = 80674066800812.

The previous prime is 121011100201213. The next prime is 121011100201273. The reversal of 121011100201221 is 122102001110121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121011100201221 - 2³ = 121011100201213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121011100201221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121011100241221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20168516700201 + ... + 20168516700206.

It is an arithmetic number, because the mean of its divisors is an integer number (40337033400408).

Almost surely, 2^{121011100201221} is an apocalyptic number.

It is an amenable number.

121011100201221 is a deficient number, since it is larger than the sum of its proper divisors (40337033400411).

121011100201221 is an equidigital number, since it uses as much as digits as its factorization.

121011100201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40337033400410.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121011100201221 its reverse (122102001110121), we get a palindrome (243113101311342).

The spelling of 121011100201221 in words is "one hundred twenty-one trillion, eleven billion, one hundred million, two hundred one thousand, two hundred twenty-one".