121208025841829 has 8 divisors (see below), whose sum is σ = 122328078828120. Its totient is φ = 120088119269376.

The previous prime is 121208025841811. The next prime is 121208025841841. The reversal of 121208025841829 is 928148520802121.

It can be written as a sum of positive squares in 4 ways, for example, as 51475889608900 + 69732136232929 = 7174670^2 + 8350577^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121208025841829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121208025891829) 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, 34939772 + ... + 38251845.

It is an arithmetic number, because the mean of its divisors is an integer number (15291009853515).

Almost surely, 2^{121208025841829} is an apocalyptic number.

It is an amenable number.

121208025841829 is a deficient number, since it is larger than the sum of its proper divisors (1120052986291).

121208025841829 is a wasteful number, since it uses less digits than its factorization.

121208025841829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73206919.

The product of its (nonzero) digits is 1474560, while the sum is 53.

The spelling of 121208025841829 in words is "one hundred twenty-one trillion, two hundred eight billion, twenty-five million, eight hundred forty-one thousand, eight hundred twenty-nine".