102022202021221 has 4 divisors (see below), whose sum is σ = 105540208987500. Its totient is φ = 98504195054944.

The previous prime is 102022202021209. The next prime is 102022202021239. The reversal of 102022202021221 is 122120202220201.

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 16463216985121 + 85558985036100 = 4057489^2 + 9249810^2 .

It is a cyclic number.

It is not a de Polignac number, because 102022202021221 - 2⁴⁵ = 66837829932389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102022202021281) 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, 1759003483096 + ... + 1759003483153.

It is an arithmetic number, because the mean of its divisors is an integer number (26385052246875).

Almost surely, 2^{102022202021221} is an apocalyptic number.

It is an amenable number.

102022202021221 is a deficient number, since it is larger than the sum of its proper divisors (3518006966279).

102022202021221 is an equidigital number, since it uses as much as digits as its factorization.

102022202021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3518006966278.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 102022202021221 its reverse (122120202220201), we get a palindrome (224142404241422).

The spelling of 102022202021221 in words is "one hundred two trillion, twenty-two billion, two hundred two million, twenty-one thousand, two hundred twenty-one".