21122112113201 has 4 divisors (see below), whose sum is σ = 23042304123504. Its totient is φ = 19201920102900.

The previous prime is 21122112113189. The next prime is 21122112113209. The reversal of 21122112113201 is 10231121122112.

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 21122112113201 - 2¹⁴ = 21122112096817 is a prime.

It is a super-2 number, since 2×21122112113201² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21122112113209) 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, 960096005135 + ... + 960096005156.

It is an arithmetic number, because the mean of its divisors is an integer number (5760576030876).

Almost surely, 2^{21122112113201} is an apocalyptic number.

It is an amenable number.

21122112113201 is a deficient number, since it is larger than the sum of its proper divisors (1920192010303).

21122112113201 is a wasteful number, since it uses less digits than its factorization.

21122112113201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1920192010302.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 21122112113201 its reverse (10231121122112), we get a palindrome (31353233235313).

The spelling of 21122112113201 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred twelve million, one hundred thirteen thousand, two hundred one".