21420310011 has 8 divisors (see below), whose sum is σ = 28561105680. Its totient is φ = 14279860512.

The previous prime is 21420309983. The next prime is 21420310069. The reversal of 21420310011 is 11001302412.

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

It is not a de Polignac number, because 21420310011 - 2⁵ = 21420309979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21420310411) 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, 150945 + ... + 256173.

It is an arithmetic number, because the mean of its divisors is an integer number (3570138210).

Almost surely, 2^21420310011 is an apocalyptic number.

21420310011 is a deficient number, since it is larger than the sum of its proper divisors (7140795669).

21420310011 is a wasteful number, since it uses less digits than its factorization.

21420310011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173085.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21420310011 its reverse (11001302412), we get a palindrome (32421612423).

The spelling of 21420310011 in words is "twenty-one billion, four hundred twenty million, three hundred ten thousand, eleven".