21010425213 has 8 divisors (see below), whose sum is σ = 28234482688. Its totient is φ = 13896658944.

The previous prime is 21010425203. The next prime is 21010425257. The reversal of 21010425213 is 31252401012.

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

It is not a de Polignac number, because 21010425213 - 2⁴ = 21010425197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21010425213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010425203) 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, 27572356 + ... + 27573117.

It is an arithmetic number, because the mean of its divisors is an integer number (3529310336).

Almost surely, 2^21010425213 is an apocalyptic number.

It is an amenable number.

21010425213 is a deficient number, since it is larger than the sum of its proper divisors (7224057475).

21010425213 is a wasteful number, since it uses less digits than its factorization.

21010425213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55145603.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 21010425213 its reverse (31252401012), we get a palindrome (52262826225).

The spelling of 21010425213 in words is "twenty-one billion, ten million, four hundred twenty-five thousand, two hundred thirteen".