121230421135525 has 12 divisors (see below), whose sum is σ = 161889239301412. Its totient is φ = 89524003299840.

The previous prime is 121230421135513. The next prime is 121230421135567. The reversal of 121230421135525 is 525531124032121.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 4191625643716 + 117038795491809 = 2047346^2 + 10818447^2 .

It is not a de Polignac number, because 121230421135525 - 2¹⁵ = 121230421102757 is a prime.

It is a super-3 number, since 3×121230421135525³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 186508339884 + ... + 186508340533.

Almost surely, 2^{121230421135525} is an apocalyptic number.

It is an amenable number.

121230421135525 is a deficient number, since it is larger than the sum of its proper divisors (40658818165887).

121230421135525 is a wasteful number, since it uses less digits than its factorization.

121230421135525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373016680440 (or 373016680435 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 37.

Adding to 121230421135525 its reverse (525531124032121), we get a palindrome (646761545167646).

The spelling of 121230421135525 in words is "one hundred twenty-one trillion, two hundred thirty billion, four hundred twenty-one million, one hundred thirty-five thousand, five hundred twenty-five".