121451503120 has 20 divisors (see below), whose sum is σ = 282374744940. Its totient is φ = 48580601216.

The previous prime is 121451503111. The next prime is 121451503157. The reversal of 121451503120 is 21305154121.

It can be written as a sum of positive squares in 2 ways, for example, as 18148400656 + 103303102464 = 134716^2 + 321408^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×121451503120² (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, 759071815 + ... + 759071974.

It is an arithmetic number, because the mean of its divisors is an integer number (14118737247).

Almost surely, 2^121451503120 is an apocalyptic number.

121451503120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121451503120 is an abundant number, since it is smaller than the sum of its proper divisors (160923241820).

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

121451503120 is a wasteful number, since it uses less digits than its factorization.

121451503120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1518143802 (or 1518143796 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 121451503120 its reverse (21305154121), we get a palindrome (142756657241).

The spelling of 121451503120 in words is "one hundred twenty-one billion, four hundred fifty-one million, five hundred three thousand, one hundred twenty".