121112011221221 has 8 divisors (see below), whose sum is σ = 122571871670304. Its totient is φ = 119652166953040.

The previous prime is 121112011221211. The next prime is 121112011221233. The reversal of 121112011221221 is 122122110211121.

It is a happy number.

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 121112011221221 - 2¹⁰ = 121112011220197 is a prime.

It is a super-2 number, since 2×121112011221221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121112011221193 and 121112011221202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121112011221211) 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, 11366495 + ... + 19272291.

It is an arithmetic number, because the mean of its divisors is an integer number (15321483958788).

Almost surely, 2^{121112011221221} is an apocalyptic number.

It is an amenable number.

121112011221221 is a deficient number, since it is larger than the sum of its proper divisors (1459860449083).

121112011221221 is an equidigital number, since it uses as much as digits as its factorization.

121112011221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8090451.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 121112011221221 its reverse (122122110211121), we get a palindrome (243234121432342).

The spelling of 121112011221221 in words is "one hundred twenty-one trillion, one hundred twelve billion, eleven million, two hundred twenty-one thousand, two hundred twenty-one".