121529439121381 has 8 divisors (see below), whose sum is σ = 124814531066400. Its totient is φ = 118244374150608.

The previous prime is 121529439121309. The next prime is 121529439121411. The reversal of 121529439121381 is 183121934925121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 121529439121381 - 2⁷ = 121529439121253 is a prime.

It is a super-2 number, since 2×121529439121381² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121529439161381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2560170 + ... + 15799156.

It is an arithmetic number, because the mean of its divisors is an integer number (15601816383300).

Almost surely, 2^{121529439121381} is an apocalyptic number.

It is an amenable number.

121529439121381 is a deficient number, since it is larger than the sum of its proper divisors (3285091945019).

121529439121381 is a wasteful number, since it uses less digits than its factorization.

121529439121381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13487123.

The product of its digits is 933120, while the sum is 52.

The spelling of 121529439121381 in words is "one hundred twenty-one trillion, five hundred twenty-nine billion, four hundred thirty-nine million, one hundred twenty-one thousand, three hundred eighty-one".