21112311201 has 4 divisors (see below), whose sum is σ = 28149748272. Its totient is φ = 14074874132.

The previous prime is 21112311173. The next prime is 21112311223. The reversal of 21112311201 is 10211321112.

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 21112311201 - 2⁶ = 21112311137 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21112311001) 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, 3518718531 + ... + 3518718536.

It is an arithmetic number, because the mean of its divisors is an integer number (7037437068).

Almost surely, 2^21112311201 is an apocalyptic number.

It is an amenable number.

21112311201 is a deficient number, since it is larger than the sum of its proper divisors (7037437071).

21112311201 is an equidigital number, since it uses as much as digits as its factorization.

21112311201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7037437070.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21112311201 its reverse (10211321112), we get a palindrome (31323632313).

The spelling of 21112311201 in words is "twenty-one billion, one hundred twelve million, three hundred eleven thousand, two hundred one".