21103232101111 has 16 divisors (see below), whose sum is σ = 23551236129600. Its totient is φ = 18815143879168.

The previous prime is 21103232101073. The next prime is 21103232101117. The reversal of 21103232101111 is 11110123230112.

It is a cyclic number.

It is not a de Polignac number, because 21103232101111 - 2¹⁵ = 21103232068343 is a prime.

It is a super-2 number, since 2×21103232101111² (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 (21103232101117) 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, 403801651 + ... + 403853908.

It is an arithmetic number, because the mean of its divisors is an integer number (1471952258100).

Almost surely, 2^{21103232101111} is an apocalyptic number.

21103232101111 is a deficient number, since it is larger than the sum of its proper divisors (2448004028489).

21103232101111 is a wasteful number, since it uses less digits than its factorization.

21103232101111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807655658.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 21103232101111 its reverse (11110123230112), we get a palindrome (32213355331223).

The spelling of 21103232101111 in words is "twenty-one trillion, one hundred three billion, two hundred thirty-two million, one hundred one thousand, one hundred eleven".