121001201201221 has 16 divisors (see below), whose sum is σ = 133828922223360. Its totient is φ = 108481346925120.

The previous prime is 121001201201201. The next prime is 121001201201281. The reversal of 121001201201221 is 122102102100121.

It is a cyclic number.

It is not a de Polignac number, because 121001201201221 - 2²⁵ = 121001167646789 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121001201201195 and 121001201201204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121001201201201) 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, 80877670 + ... + 82360183.

It is an arithmetic number, because the mean of its divisors is an integer number (8364307638960).

Almost surely, 2^{121001201201221} is an apocalyptic number.

121001201201221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121001201201221 is a deficient number, since it is larger than the sum of its proper divisors (12827721022139).

121001201201221 is a wasteful number, since it uses less digits than its factorization.

121001201201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163238796.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121001201201221 its reverse (122102102100121), we get a palindrome (243103303301342).

The spelling of 121001201201221 in words is "one hundred twenty-one trillion, one billion, two hundred one million, two hundred one thousand, two hundred twenty-one".