21421234140213 has 8 divisors (see below), whose sum is σ = 28563020676576. Its totient is φ = 14280135182000.

The previous prime is 21421234140193. The next prime is 21421234140239. The reversal of 21421234140213 is 31204143212412.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21421234140213 - 2⁸ = 21421234139957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21421234120213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171821838 + ... + 171946463.

It is an arithmetic number, because the mean of its divisors is an integer number (3570377584572).

Almost surely, 2^{21421234140213} is an apocalyptic number.

It is an amenable number.

21421234140213 is a deficient number, since it is larger than the sum of its proper divisors (7141786536363).

21421234140213 is a wasteful number, since it uses less digits than its factorization.

21421234140213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343789075.

The product of its (nonzero) digits is 9216, while the sum is 30.

Adding to 21421234140213 its reverse (31204143212412), we get a palindrome (52625377352625).

The spelling of 21421234140213 in words is "twenty-one trillion, four hundred twenty-one billion, two hundred thirty-four million, one hundred forty thousand, two hundred thirteen".