21303121120211 has 16 divisors (see below), whose sum is σ = 24598770954240. Its totient is φ = 18070578696960.

The previous prime is 21303121120201. The next prime is 21303121120213. The reversal of 21303121120211 is 11202112130312.

It is a cyclic number.

It is not a de Polignac number, because 21303121120211 - 2²² = 21303116925907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21303121120213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11625806 + ... + 13332876.

It is an arithmetic number, because the mean of its divisors is an integer number (1537423184640).

Almost surely, 2^{21303121120211} is an apocalyptic number.

21303121120211 is a deficient number, since it is larger than the sum of its proper divisors (3295649834029).

21303121120211 is a wasteful number, since it uses less digits than its factorization.

21303121120211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1725554.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 21303121120211 its reverse (11202112130312), we get a palindrome (32505233250523).

It can be divided in two parts, 2130312 and 1120211, that added together give a palindrome (3250523).

The spelling of 21303121120211 in words is "twenty-one trillion, three hundred three billion, one hundred twenty-one million, one hundred twenty thousand, two hundred eleven".