10121205405 has 8 divisors (see below), whose sum is σ = 16193928672. Its totient is φ = 5397976208.

The previous prime is 10121205383. The next prime is 10121205421. The reversal of 10121205405 is 50450212101.

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 10121205405 - 2¹¹ = 10121203357 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, 337373499 + ... + 337373528.

It is an arithmetic number, because the mean of its divisors is an integer number (2024241084).

Almost surely, 2^10121205405 is an apocalyptic number.

10121205405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10121205405 is a deficient number, since it is larger than the sum of its proper divisors (6072723267).

10121205405 is an equidigital number, since it uses as much as digits as its factorization.

10121205405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674747035.

The product of its (nonzero) digits is 400, while the sum is 21.

Adding to 10121205405 its reverse (50450212101), we get a palindrome (60571417506).

The spelling of 10121205405 in words is "ten billion, one hundred twenty-one million, two hundred five thousand, four hundred five".