21421210142234 has 8 divisors (see below), whose sum is σ = 36722074529568. Its totient is φ = 9180518632380.

The previous prime is 21421210142191. The next prime is 21421210142243. The reversal of 21421210142234 is 43224101212412.

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

It is a junction number, because it is equal to n+sod(n) for n = 21421210142197 and 21421210142206.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 765043219352 + ... + 765043219379.

It is an arithmetic number, because the mean of its divisors is an integer number (4590259316196).

Almost surely, 2^{21421210142234} is an apocalyptic number.

21421210142234 is a deficient number, since it is larger than the sum of its proper divisors (15300864387334).

21421210142234 is a wasteful number, since it uses less digits than its factorization.

21421210142234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1530086438740.

The product of its (nonzero) digits is 6144, while the sum is 29.

Adding to 21421210142234 its reverse (43224101212412), we get a palindrome (64645311354646).

The spelling of 21421210142234 in words is "twenty-one trillion, four hundred twenty-one billion, two hundred ten million, one hundred forty-two thousand, two hundred thirty-four".