121121404444 has 24 divisors (see below), whose sum is σ = 212305045680. Its totient is φ = 60462882816.

The previous prime is 121121404423. The next prime is 121121404447. The reversal of 121121404444 is 444404121121.

It is a super-2 number, since 2×121121404444² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121121404447) 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, 10278684 + ... + 10290460.

It is an arithmetic number, because the mean of its divisors is an integer number (8846043570).

Almost surely, 2^121121404444 is an apocalyptic number.

It is an amenable number.

121121404444 is a deficient number, since it is larger than the sum of its proper divisors (91183641236).

121121404444 is a wasteful number, since it uses less digits than its factorization.

121121404444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15717 (or 15715 counting only the distinct ones).

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

Adding to 121121404444 its reverse (444404121121), we get a palindrome (565525525565).

The spelling of 121121404444 in words is "one hundred twenty-one billion, one hundred twenty-one million, four hundred four thousand, four hundred forty-four".