121415321444 has 48 divisors (see below), whose sum is σ = 236985134400. Its totient is φ = 54090832896.

The previous prime is 121415321411. The next prime is 121415321473. The reversal of 121415321444 is 444123514121.

It is a self number, because there is not a number n which added to its sum of digits gives 121415321444.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1818647 + ... + 1884225.

It is an arithmetic number, because the mean of its divisors is an integer number (4937190300).

Almost surely, 2^121415321444 is an apocalyptic number.

It is an amenable number.

121415321444 is a deficient number, since it is larger than the sum of its proper divisors (115569812956).

121415321444 is a wasteful number, since it uses less digits than its factorization.

121415321444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67052 (or 67050 counting only the distinct ones).

The product of its digits is 15360, while the sum is 32.

Adding to 121415321444 its reverse (444123514121), we get a palindrome (565538835565).

The spelling of 121415321444 in words is "one hundred twenty-one billion, four hundred fifteen million, three hundred twenty-one thousand, four hundred forty-four".