16421212461 has 32 divisors (see below), whose sum is σ = 23315447808. Its totient is φ = 10262099520.

The previous prime is 16421212459. The next prime is 16421212469.

16421212461 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 16421212461 - 2¹ = 16421212459 is a prime.

It is a super-3 number, since 3×16421212461³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16421212469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 770596 + ... + 791618.

It is an arithmetic number, because the mean of its divisors is an integer number (728607744).

Almost surely, 2^16421212461 is an apocalyptic number.

It is an amenable number.

16421212461 is a deficient number, since it is larger than the sum of its proper divisors (6894235347).

16421212461 is a wasteful number, since it uses less digits than its factorization.

16421212461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21321.

The product of its digits is 4608, while the sum is 30.

The spelling of 16421212461 in words is "sixteen billion, four hundred twenty-one million, two hundred twelve thousand, four hundred sixty-one".