102200202221021 has 4 divisors (see below), whose sum is σ = 102201035590332. Its totient is φ = 102199368851712.

The previous prime is 102200202220993. The next prime is 102200202221059. The reversal of 102200202221021 is 120122202002201.

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 37404061564996 + 64796140656025 = 6115886^2 + 8049605^2 .

It is a cyclic number.

It is not a de Polignac number, because 102200202221021 - 2²⁶ = 102200135112157 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 (102200202221081) 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, 416500676 + ... + 416745981.

It is an arithmetic number, because the mean of its divisors is an integer number (25550258897583).

Almost surely, 2^{102200202221021} is an apocalyptic number.

It is an amenable number.

102200202221021 is a deficient number, since it is larger than the sum of its proper divisors (833369311).

102200202221021 is an equidigital number, since it uses as much as digits as its factorization.

102200202221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833369310.

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

Adding to 102200202221021 its reverse (120122202002201), we get a palindrome (222322404223222).

The spelling of 102200202221021 in words is "one hundred two trillion, two hundred billion, two hundred two million, two hundred twenty-one thousand, twenty-one".