21232120112101 has 4 divisors (see below), whose sum is σ = 21438257200672. Its totient is φ = 21025983023532.

The previous prime is 21232120112089. The next prime is 21232120112117. The reversal of 21232120112101 is 10121102123212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21232120112101 - 2¹⁵ = 21232120079333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232120112171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103068544131 + ... + 103068544336.

It is an arithmetic number, because the mean of its divisors is an integer number (5359564300168).

Almost surely, 2^{21232120112101} is an apocalyptic number.

It is an amenable number.

21232120112101 is a deficient number, since it is larger than the sum of its proper divisors (206137088571).

21232120112101 is a wasteful number, since it uses less digits than its factorization.

21232120112101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206137088570.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 21232120112101 its reverse (10121102123212), we get a palindrome (31353222235313).

The spelling of 21232120112101 in words is "twenty-one trillion, two hundred thirty-two billion, one hundred twenty million, one hundred twelve thousand, one hundred one".