308405111421 has 16 divisors (see below), whose sum is σ = 448648481088. Its totient is φ = 186887510400.

The previous prime is 308405111387. The next prime is 308405111459. The reversal of 308405111421 is 124111504803.

308405111421 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 308405111421 - 2¹¹ = 308405109373 is a prime.

It is a super-2 number, since 2×308405111421² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308405111491) 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, 361656 + ... + 864641.

It is an arithmetic number, because the mean of its divisors is an integer number (28040530068).

Almost surely, 2^308405111421 is an apocalyptic number.

It is an amenable number.

308405111421 is a deficient number, since it is larger than the sum of its proper divisors (140243369667).

308405111421 is a wasteful number, since it uses less digits than its factorization.

308405111421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233932.

The product of its (nonzero) digits is 3840, while the sum is 30.

The spelling of 308405111421 in words is "three hundred eight billion, four hundred five million, one hundred eleven thousand, four hundred twenty-one".