121505143044 has 12 divisors (see below), whose sum is σ = 283512000464. Its totient is φ = 40501714344.

The previous prime is 121505143021. The next prime is 121505143087. The reversal of 121505143044 is 440341505121.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×121505143044² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5062714282 + ... + 5062714305.

Almost surely, 2^121505143044 is an apocalyptic number.

It is an amenable number.

121505143044 is an abundant number, since it is smaller than the sum of its proper divisors (162006857420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121505143044 is a wasteful number, since it uses less digits than its factorization.

121505143044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10125428594 (or 10125428592 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 121505143044 its reverse (440341505121), we get a palindrome (561846648165).

The spelling of 121505143044 in words is "one hundred twenty-one billion, five hundred five million, one hundred forty-three thousand, forty-four".