405005422121 has 16 divisors (see below), whose sum is σ = 418387673088. Its totient is φ = 391804938000.

The previous prime is 405005422091. The next prime is 405005422181. The reversal of 405005422121 is 121224500504.

It is a cyclic number.

It is not a de Polignac number, because 405005422121 - 2⁶ = 405005422057 is a prime.

It is a super-2 number, since 2×405005422121² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405005422181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36577016 + ... + 36588086.

It is an arithmetic number, because the mean of its divisors is an integer number (26149229568).

Almost surely, 2^405005422121 is an apocalyptic number.

It is an amenable number.

405005422121 is a deficient number, since it is larger than the sum of its proper divisors (13382250967).

405005422121 is a wasteful number, since it uses less digits than its factorization.

405005422121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19172.

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 405005422121 its reverse (121224500504), we get a palindrome (526229922625).

The spelling of 405005422121 in words is "four hundred five billion, five million, four hundred twenty-two thousand, one hundred twenty-one".