102220021130021 has 4 divisors (see below), whose sum is σ = 108232963549452. Its totient is φ = 96207078710592.

The previous prime is 102220021129927. The next prime is 102220021130047. The reversal of 102220021130021 is 120031120022201.

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 72509738020225 + 29710283109796 = 8515265^2 + 5450714^2 .

It is a cyclic number.

It is not a de Polignac number, because 102220021130021 - 2³⁰ = 102218947388197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 6012942419413 = 102220021130021 / (1 + 0 + 2 + 2 + 2 + 0 + 0 + 2 + 1 + 1 + 3 + 0 + 0 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102220021130221) 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, 3006471209690 + ... + 3006471209723.

It is an arithmetic number, because the mean of its divisors is an integer number (27058240887363).

Almost surely, 2^{102220021130021} is an apocalyptic number.

It is an amenable number.

102220021130021 is a deficient number, since it is larger than the sum of its proper divisors (6012942419431).

102220021130021 is an equidigital number, since it uses as much as digits as its factorization.

102220021130021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6012942419430.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 102220021130021 its reverse (120031120022201), we get a palindrome (222251141152222).

The spelling of 102220021130021 in words is "one hundred two trillion, two hundred twenty billion, twenty-one million, one hundred thirty thousand, twenty-one".