121504221445 has 8 divisors (see below), whose sum is σ = 145917145080. Its totient is φ = 97128657600.

The previous prime is 121504221413. The next prime is 121504221457. The reversal of 121504221445 is 544122405121.

It can be written as a sum of positive squares in 4 ways, for example, as 1786837441 + 119717384004 = 42271^2 + 346002^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121504221445 - 2⁵ = 121504221413 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9332790 + ... + 9345799.

It is an arithmetic number, because the mean of its divisors is an integer number (18239643135).

Almost surely, 2^121504221445 is an apocalyptic number.

It is an amenable number.

121504221445 is a deficient number, since it is larger than the sum of its proper divisors (24412923635).

121504221445 is a wasteful number, since it uses less digits than its factorization.

121504221445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18679895.

The product of its (nonzero) digits is 12800, while the sum is 31.

Adding to 121504221445 its reverse (544122405121), we get a palindrome (665626626566).

The spelling of 121504221445 in words is "one hundred twenty-one billion, five hundred four million, two hundred twenty-one thousand, four hundred forty-five".