121011202231221 has 8 divisors (see below), whose sum is σ = 161553286505824. Its totient is φ = 80571626388720.

The previous prime is 121011202231201. The next prime is 121011202231229. The reversal of 121011202231221 is 122132202110121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121011202231221 - 2⁵ = 121011202231189 is a prime.

It is a super-2 number, since 2×121011202231221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121011202231229) 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, 25627105270 + ... + 25627109991.

It is an arithmetic number, because the mean of its divisors is an integer number (20194160813228).

Almost surely, 2^{121011202231221} is an apocalyptic number.

It is an amenable number.

121011202231221 is a deficient number, since it is larger than the sum of its proper divisors (40542084274603).

121011202231221 is an equidigital number, since it uses as much as digits as its factorization.

121011202231221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51254216051.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 121011202231221 its reverse (122132202110121), we get a palindrome (243143404341342).

The spelling of 121011202231221 in words is "one hundred twenty-one trillion, eleven billion, two hundred two million, two hundred thirty-one thousand, two hundred twenty-one".