20211122201 has 4 divisors (see below), whose sum is σ = 20261524404. Its totient is φ = 20160720000.

The previous prime is 20211122177. The next prime is 20211122209. The reversal of 20211122201 is 10222111202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10222111202 = 2 ⋅5111055601.

It can be written as a sum of positive squares in 2 ways, for example, as 10342686601 + 9868435600 = 101699^2 + 99340^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20211122201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20211122209) 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, 25200500 + ... + 25201301.

It is an arithmetic number, because the mean of its divisors is an integer number (5065381101).

Almost surely, 2^20211122201 is an apocalyptic number.

It is an amenable number.

20211122201 is a deficient number, since it is larger than the sum of its proper divisors (50402203).

20211122201 is an equidigital number, since it uses as much as digits as its factorization.

20211122201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50402202.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20211122201 its reverse (10222111202), we get a palindrome (30433233403).

The spelling of 20211122201 in words is "twenty billion, two hundred eleven million, one hundred twenty-two thousand, two hundred one".