21033214232111 has 16 divisors (see below), whose sum is σ = 21956598662400. Its totient is φ = 20125155283200.

The previous prime is 21033214232077. The next prime is 21033214232117. The reversal of 21033214232111 is 11123241233012.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21033214232111 is a prime.

It is a super-2 number, since 2×21033214232111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033214232117) 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, 69544205 + ... + 69845993.

It is an arithmetic number, because the mean of its divisors is an integer number (1372287416400).

Almost surely, 2^{21033214232111} is an apocalyptic number.

21033214232111 is a deficient number, since it is larger than the sum of its proper divisors (923384430289).

21033214232111 is a wasteful number, since it uses less digits than its factorization.

21033214232111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327170.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 21033214232111 its reverse (11123241233012), we get a palindrome (32156455465123).

The spelling of 21033214232111 in words is "twenty-one trillion, thirty-three billion, two hundred fourteen million, two hundred thirty-two thousand, one hundred eleven".