121404343661 has 8 divisors (see below), whose sum is σ = 122886691200. Its totient is φ = 119924624160.

The previous prime is 121404343657. The next prime is 121404343663. The reversal of 121404343661 is 166343404121.

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 121404343661 - 2² = 121404343657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121404343663) 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, 563975 + ... + 748916.

It is an arithmetic number, because the mean of its divisors is an integer number (15360836400).

Almost surely, 2^121404343661 is an apocalyptic number.

It is an amenable number.

121404343661 is a deficient number, since it is larger than the sum of its proper divisors (1482347539).

121404343661 is a wasteful number, since it uses less digits than its factorization.

121404343661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314019.

The product of its (nonzero) digits is 41472, while the sum is 35.

Adding to 121404343661 its reverse (166343404121), we get a palindrome (287747747782).

The spelling of 121404343661 in words is "one hundred twenty-one billion, four hundred four million, three hundred forty-three thousand, six hundred sixty-one".