121421224441 has 16 divisors (see below), whose sum is σ = 134135947008. Its totient is φ = 108991872000.

The previous prime is 121421224423. The next prime is 121421224453. The reversal of 121421224441 is 144422124121.

It is not a de Polignac number, because 121421224441 - 2⁵ = 121421224409 is a prime.

It is a super-2 number, since 2×121421224441² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121421224411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 258841 + ... + 556633.

It is an arithmetic number, because the mean of its divisors is an integer number (8383496688).

Almost surely, 2^121421224441 is an apocalyptic number.

121421224441 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121421224441 is a deficient number, since it is larger than the sum of its proper divisors (12714722567).

121421224441 is a wasteful number, since it uses less digits than its factorization.

121421224441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298272.

The product of its digits is 4096, while the sum is 28.

Adding to 121421224441 its reverse (144422124121), we get a palindrome (265843348562).

The spelling of 121421224441 in words is "one hundred twenty-one billion, four hundred twenty-one million, two hundred twenty-four thousand, four hundred forty-one".