21122101201 has 4 divisors (see below), whose sum is σ = 21376584432. Its totient is φ = 20867617972.

The previous prime is 21122101199. The next prime is 21122101211. The reversal of 21122101201 is 10210122112.

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 not a de Polignac number, because 21122101201 - 2¹ = 21122101199 is a prime.

It is a super-2 number, since 2×21122101201² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21122101211) 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, 127241491 + ... + 127241656.

It is an arithmetic number, because the mean of its divisors is an integer number (5344146108).

Almost surely, 2^21122101201 is an apocalyptic number.

It is an amenable number.

21122101201 is a deficient number, since it is larger than the sum of its proper divisors (254483231).

21122101201 is an equidigital number, since it uses as much as digits as its factorization.

21122101201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254483230.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21122101201 its reverse (10210122112), we get a palindrome (31332223313).

The spelling of 21122101201 in words is "twenty-one billion, one hundred twenty-two million, one hundred one thousand, two hundred one".