121022221211221 has 16 divisors (see below), whose sum is σ = 132075437574528. Its totient is φ = 109977545246400.

The previous prime is 121022221211173. The next prime is 121022221211231. The reversal of 121022221211221 is 122112122220121.

It is a cyclic number.

It is not a de Polignac number, because 121022221211221 - 2¹³ = 121022221203029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121022221211192 and 121022221211201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121022221211231) 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, 324159360 + ... + 324532486.

It is an arithmetic number, because the mean of its divisors is an integer number (8254714848408).

Almost surely, 2^{121022221211221} is an apocalyptic number.

121022221211221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121022221211221 is a deficient number, since it is larger than the sum of its proper divisors (11053216363307).

121022221211221 is a wasteful number, since it uses less digits than its factorization.

121022221211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384492.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 121022221211221 its reverse (122112122220121), we get a palindrome (243134343431342).

The spelling of 121022221211221 in words is "one hundred twenty-one trillion, twenty-two billion, two hundred twenty-one million, two hundred eleven thousand, two hundred twenty-one".