21231102232111 has 16 divisors (see below), whose sum is σ = 22709234329600. Its totient is φ = 19791528333408.

The previous prime is 21231102232049. The next prime is 21231102232147. The reversal of 21231102232111 is 11123220113212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21231102232111 - 2¹⁵ = 21231102199343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21231102292111) 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, 34243071 + ... + 34857568.

It is an arithmetic number, because the mean of its divisors is an integer number (1419327145600).

Almost surely, 2^{21231102232111} is an apocalyptic number.

21231102232111 is a deficient number, since it is larger than the sum of its proper divisors (1478132097489).

21231102232111 is a wasteful number, since it uses less digits than its factorization.

21231102232111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69100918.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 21231102232111 its reverse (11123220113212), we get a palindrome (32354322345323).

The spelling of 21231102232111 in words is "twenty-one trillion, two hundred thirty-one billion, one hundred two million, two hundred thirty-two thousand, one hundred eleven".