121434643405 has 8 divisors (see below), whose sum is σ = 148191429600. Its totient is φ = 95501143056.

The previous prime is 121434643381. The next prime is 121434643417. The reversal of 121434643405 is 504346434121.

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 121434643405 - 2¹⁹ = 121434119117 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205821135 + ... + 205821724.

It is an arithmetic number, because the mean of its divisors is an integer number (18523928700).

Almost surely, 2^121434643405 is an apocalyptic number.

It is an amenable number.

121434643405 is a deficient number, since it is larger than the sum of its proper divisors (26756786195).

121434643405 is an equidigital number, since it uses as much as digits as its factorization.

121434643405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411642923.

The product of its (nonzero) digits is 138240, while the sum is 37.

The spelling of 121434643405 in words is "one hundred twenty-one billion, four hundred thirty-four million, six hundred forty-three thousand, four hundred five".