21421134201 has 8 divisors (see below), whose sum is σ = 29333445184. Its totient is φ = 13894789680.

The previous prime is 21421134191. The next prime is 21421134209. The reversal of 21421134201 is 10243112412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21421134201 - 2¹⁵ = 21421101433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21421134209) 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 7 ways as a sum of consecutive naturals, for example, 96491485 + ... + 96491706.

It is an arithmetic number, because the mean of its divisors is an integer number (3666680648).

Almost surely, 2^21421134201 is an apocalyptic number.

It is an amenable number.

21421134201 is a deficient number, since it is larger than the sum of its proper divisors (7912310983).

21421134201 is a wasteful number, since it uses less digits than its factorization.

21421134201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192983231.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21421134201 its reverse (10243112412), we get a palindrome (31664246613).

The spelling of 21421134201 in words is "twenty-one billion, four hundred twenty-one million, one hundred thirty-four thousand, two hundred one".