20221222001 has 4 divisors (see below), whose sum is σ = 20296394100. Its totient is φ = 20146049904.

The previous prime is 20221221997. The next prime is 20221222037. The reversal of 20221222001 is 10022212202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10022212202 = 2 ⋅5011106101.

It can be written as a sum of positive squares in 2 ways, for example, as 6938890000 + 13282332001 = 83300^2 + 115249^2 .

It is a cyclic number.

It is not a de Polignac number, because 20221222001 - 2² = 20221221997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20221222061) 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, 37585646 + ... + 37586183.

It is an arithmetic number, because the mean of its divisors is an integer number (5074098525).

Almost surely, 2^20221222001 is an apocalyptic number.

It is an amenable number.

20221222001 is a deficient number, since it is larger than the sum of its proper divisors (75172099).

20221222001 is an equidigital number, since it uses as much as digits as its factorization.

20221222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75172098.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20221222001 its reverse (10022212202), we get a palindrome (30243434203).

The spelling of 20221222001 in words is "twenty billion, two hundred twenty-one million, two hundred twenty-two thousand, one".