21021210059 has 4 divisors (see below), whose sum is σ = 21022350000. Its totient is φ = 21020070120.

The previous prime is 21021210037. The next prime is 21021210071. The reversal of 21021210059 is 95001212012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21021210059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21021210029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 541847 + ... + 579344.

It is an arithmetic number, because the mean of its divisors is an integer number (5255587500).

Almost surely, 2^21021210059 is an apocalyptic number.

21021210059 is a deficient number, since it is larger than the sum of its proper divisors (1139941).

21021210059 is a wasteful number, since it uses less digits than its factorization.

21021210059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139940.

The product of its (nonzero) digits is 360, while the sum is 23.

The spelling of 21021210059 in words is "twenty-one billion, twenty-one million, two hundred ten thousand, fifty-nine".