21221001130311 has 24 divisors (see below), whose sum is σ = 31986612268416. Its totient is φ = 13531667711760.

The previous prime is 21221001130243. The next prime is 21221001130337. The reversal of 21221001130311 is 11303110012212.

21221001130311 is a `hidden beast` number, since 2 + 1 + 221 + 0 + 0 + 1 + 130 + 311 = 666.

It is not a de Polignac number, because 21221001130311 - 2²¹ = 21220999033159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21221001130361) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2859136 + ... + 7114538.

It is an arithmetic number, because the mean of its divisors is an integer number (1332775511184).

Almost surely, 2^{21221001130311} is an apocalyptic number.

21221001130311 is a deficient number, since it is larger than the sum of its proper divisors (10765611138105).

21221001130311 is a wasteful number, since it uses less digits than its factorization.

21221001130311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4279523 (or 4279520 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 21221001130311 its reverse (11303110012212), we get a palindrome (32524111142523).

The spelling of 21221001130311 in words is "twenty-one trillion, two hundred twenty-one billion, one million, one hundred thirty thousand, three hundred eleven".