21021232222111 has 8 divisors (see below), whose sum is σ = 24139214035200. Its totient is φ = 18104410526040.

The previous prime is 21021232222103. The next prime is 21021232222157. The reversal of 21021232222111 is 11122223212012.

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 21021232222111 - 2³ = 21021232222103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021232222511) 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, 50290029031 + ... + 50290029448.

It is an arithmetic number, because the mean of its divisors is an integer number (3017401754400).

Almost surely, 2^{21021232222111} is an apocalyptic number.

21021232222111 is a deficient number, since it is larger than the sum of its proper divisors (3117981813089).

21021232222111 is a wasteful number, since it uses less digits than its factorization.

21021232222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100580058509.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 21021232222111 its reverse (11122223212012), we get a palindrome (32143455434123).

It can be divided in two parts, 2102123 and 2222111, that added together give a palindrome (4324234).

The spelling of 21021232222111 in words is "twenty-one trillion, twenty-one billion, two hundred thirty-two million, two hundred twenty-two thousand, one hundred eleven".