21036211051 has 8 divisors (see below), whose sum is σ = 21068356608. Its totient is φ = 21004089000.

The previous prime is 21036210913. The next prime is 21036211067. The reversal of 21036211051 is 15011263012.

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 21036211051 - 2⁹ = 21036210539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21036211151) 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, 2589486 + ... + 2597596.

It is an arithmetic number, because the mean of its divisors is an integer number (2633544576).

Almost surely, 2^21036211051 is an apocalyptic number.

21036211051 is a deficient number, since it is larger than the sum of its proper divisors (32145557).

21036211051 is an equidigital number, since it uses as much as digits as its factorization.

21036211051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11753.

The product of its (nonzero) digits is 360, while the sum is 22.

Adding to 21036211051 its reverse (15011263012), we get a palindrome (36047474063).

The spelling of 21036211051 in words is "twenty-one billion, thirty-six million, two hundred eleven thousand, fifty-one".