102021212122201 has 4 divisors (see below), whose sum is σ = 102072401894452. Its totient is φ = 101970022349952.

The previous prime is 102021212122187. The next prime is 102021212122231. The reversal of 102021212122201 is 102221212120201.

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 81093194790976 + 20928017331225 = 9005176^2 + 4574715^2 .

It is a cyclic number.

It is not a de Polignac number, because 102021212122201 - 2⁵ = 102021212122169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102021212122231) 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, 25594883136 + ... + 25594887121.

It is an arithmetic number, because the mean of its divisors is an integer number (25518100473613).

Almost surely, 2^{102021212122201} is an apocalyptic number.

It is an amenable number.

102021212122201 is a deficient number, since it is larger than the sum of its proper divisors (51189772251).

102021212122201 is an equidigital number, since it uses as much as digits as its factorization.

102021212122201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51189772250.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 102021212122201 its reverse (102221212120201), we get a palindrome (204242424242402).

The spelling of 102021212122201 in words is "one hundred two trillion, twenty-one billion, two hundred twelve million, one hundred twenty-two thousand, two hundred one".