21223100112113 has 4 divisors (see below), whose sum is σ = 21269540156580. Its totient is φ = 21176660067648.

The previous prime is 21223100112031. The next prime is 21223100112131. The reversal of 21223100112113 is 31121100132212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18773051852944 + 2450048259169 = 4332788^2 + 1565263^2 .

It is a cyclic number.

It is not a de Polignac number, because 21223100112113 - 2¹⁸ = 21223099849969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21223100112163) 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, 23220021548 + ... + 23220022461.

It is an arithmetic number, because the mean of its divisors is an integer number (5317385039145).

Almost surely, 2^{21223100112113} is an apocalyptic number.

It is an amenable number.

21223100112113 is a deficient number, since it is larger than the sum of its proper divisors (46440044467).

21223100112113 is an equidigital number, since it uses as much as digits as its factorization.

21223100112113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46440044466.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 21223100112113 its reverse (31121100132212), we get a palindrome (52344200244325).

The spelling of 21223100112113 in words is "twenty-one trillion, two hundred twenty-three billion, one hundred million, one hundred twelve thousand, one hundred thirteen".