20210102222201 has 4 divisors (see below), whose sum is σ = 20210392212900. Its totient is φ = 20209812231504.

The previous prime is 20210102222173. The next prime is 20210102222203. The reversal of 20210102222201 is 10222220101202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2095068079225 + 18115034142976 = 1447435^2 + 4256176^2 .

It is a cyclic number.

It is not a de Polignac number, because 20210102222201 - 2²² = 20210098027897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20210102222201.

It is not an unprimeable number, because it can be changed into a prime (20210102222203) 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, 144890786 + ... + 145030203.

It is an arithmetic number, because the mean of its divisors is an integer number (5052598053225).

Almost surely, 2^{20210102222201} is an apocalyptic number.

It is an amenable number.

20210102222201 is a deficient number, since it is larger than the sum of its proper divisors (289990699).

20210102222201 is an equidigital number, since it uses as much as digits as its factorization.

20210102222201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289990698.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20210102222201 its reverse (10222220101202), we get a palindrome (30432322323403).

The spelling of 20210102222201 in words is "twenty trillion, two hundred ten billion, one hundred two million, two hundred twenty-two thousand, two hundred one".