102020221200121 has 4 divisors (see below), whose sum is σ = 116594538514432. Its totient is φ = 87445903885812.

The previous prime is 102020221200109. The next prime is 102020221200127. The reversal of 102020221200121 is 121002122020201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 102020221200121 - 2¹¹ = 102020221198073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102020221200095 and 102020221200104.

It is not an unprimeable number, because it can be changed into a prime (102020221200127) 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, 7287158657145 + ... + 7287158657158.

It is an arithmetic number, because the mean of its divisors is an integer number (29148634628608).

Almost surely, 2^{102020221200121} is an apocalyptic number.

It is an amenable number.

102020221200121 is a deficient number, since it is larger than the sum of its proper divisors (14574317314311).

102020221200121 is an equidigital number, since it uses as much as digits as its factorization.

102020221200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14574317314310.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 102020221200121 its reverse (121002122020201), we get a palindrome (223022343220322).

The spelling of 102020221200121 in words is "one hundred two trillion, twenty billion, two hundred twenty-one million, two hundred thousand, one hundred twenty-one".