121661326834 has 8 divisors (see below), whose sum is σ = 183824048988. Its totient is φ = 60386643840.

The previous prime is 121661326819. The next prime is 121661326837. The reversal of 121661326834 is 438623166121.

It can be written as a sum of positive squares in 2 ways, for example, as 100695155625 + 20966171209 = 317325^2 + 144797^2 .

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

It is not an unprimeable number, because it can be changed into a prime (121661326837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222009447 + ... + 222009994.

Almost surely, 2^121661326834 is an apocalyptic number.

121661326834 is a deficient number, since it is larger than the sum of its proper divisors (62162722154).

121661326834 is a wasteful number, since it uses less digits than its factorization.

121661326834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444019580.

The product of its digits is 248832, while the sum is 43.

The spelling of 121661326834 in words is "one hundred twenty-one billion, six hundred sixty-one million, three hundred twenty-six thousand, eight hundred thirty-four".