121331035421 has 8 divisors (see below), whose sum is σ = 122276840280. Its totient is φ = 120388848192.

The previous prime is 121331035417. The next prime is 121331035447. The reversal of 121331035421 is 124530133121.

It can be written as a sum of positive squares in 4 ways, for example, as 57329119225 + 64001916196 = 239435^2 + 252986^2 .

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 121331035421 - 2² = 121331035417 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 (121331034421) 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, 837050 + ... + 971243.

It is an arithmetic number, because the mean of its divisors is an integer number (15284605035).

Almost surely, 2^121331035421 is an apocalyptic number.

It is an amenable number.

121331035421 is a deficient number, since it is larger than the sum of its proper divisors (945804859).

121331035421 is a wasteful number, since it uses less digits than its factorization.

121331035421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1808815.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 121331035421 its reverse (124530133121), we get a palindrome (245861168542).

The spelling of 121331035421 in words is "one hundred twenty-one billion, three hundred thirty-one million, thirty-five thousand, four hundred twenty-one".