21113111203331 has 16 divisors (see below), whose sum is σ = 25561432564416. Its totient is φ = 17023896646656.

The previous prime is 21113111203321. The next prime is 21113111203339. The reversal of 21113111203331 is 13330211131112.

It is a cyclic number.

It is not a de Polignac number, because 21113111203331 - 2³⁴ = 21095931334147 is a prime.

It is a super-2 number, since 2×21113111203331² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21113111203297 and 21113111203306.

It is not an unprimeable number, because it can be changed into a prime (21113111203339) 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, 44184266 + ... + 44659551.

It is an arithmetic number, because the mean of its divisors is an integer number (1597589535276).

Almost surely, 2^{21113111203331} is an apocalyptic number.

21113111203331 is a deficient number, since it is larger than the sum of its proper divisors (4448321361085).

21113111203331 is a wasteful number, since it uses less digits than its factorization.

21113111203331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88845838.

The product of its (nonzero) digits is 324, while the sum is 23.

Adding to 21113111203331 its reverse (13330211131112), we get a palindrome (34443322334443).

The spelling of 21113111203331 in words is "twenty-one trillion, one hundred thirteen billion, one hundred eleven million, two hundred three thousand, three hundred thirty-one".