20212111201 has 4 divisors (see below), whose sum is σ = 20212715952. Its totient is φ = 20211506452.

The previous prime is 20212111187. The next prime is 20212111207. The reversal of 20212111201 is 10211121202.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10211121202 = 2 ⋅5105560601.

It is a cyclic number.

It is not a de Polignac number, because 20212111201 - 2⁵ = 20212111169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20212111207) 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, 249115 + ... + 320128.

It is an arithmetic number, because the mean of its divisors is an integer number (5053178988).

Almost surely, 2^20212111201 is an apocalyptic number.

It is an amenable number.

20212111201 is a deficient number, since it is larger than the sum of its proper divisors (604751).

20212111201 is an equidigital number, since it uses as much as digits as its factorization.

20212111201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604750.

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

Adding to 20212111201 its reverse (10211121202), we get a palindrome (30423232403).

The spelling of 20212111201 in words is "twenty billion, two hundred twelve million, one hundred eleven thousand, two hundred one".