121124401521 has 32 divisors (see below), whose sum is σ = 174802501632. Its totient is φ = 74408906880.

The previous prime is 121124401499. The next prime is 121124401523. The reversal of 121124401521 is 125104421121.

It is not a de Polignac number, because 121124401521 - 2¹⁰ = 121124400497 is a prime.

It is a super-3 number, since 3×121124401521³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 121124401491 and 121124401500.

It is not an unprimeable number, because it can be changed into a prime (121124401523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63025 + ... + 496206.

It is an arithmetic number, because the mean of its divisors is an integer number (5462578176).

Almost surely, 2^121124401521 is an apocalyptic number.

It is an amenable number.

121124401521 is a deficient number, since it is larger than the sum of its proper divisors (53678100111).

121124401521 is a wasteful number, since it uses less digits than its factorization.

121124401521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559373.

The product of its (nonzero) digits is 640, while the sum is 24.

Adding to 121124401521 its reverse (125104421121), we get a palindrome (246228822642).

The spelling of 121124401521 in words is "one hundred twenty-one billion, one hundred twenty-four million, four hundred one thousand, five hundred twenty-one".