102201211200021 has 4 divisors (see below), whose sum is σ = 136268281600032. Its totient is φ = 68134140800012.

The previous prime is 102201211199977. The next prime is 102201211200041. The reversal of 102201211200021 is 120002112102201.

102201211200021 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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 102201211200021 - 2⁹ = 102201211199509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102201211200041) 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, 17033535200001 + ... + 17033535200006.

It is an arithmetic number, because the mean of its divisors is an integer number (34067070400008).

Almost surely, 2^{102201211200021} is an apocalyptic number.

It is an amenable number.

102201211200021 is a deficient number, since it is larger than the sum of its proper divisors (34067070400011).

102201211200021 is an equidigital number, since it uses as much as digits as its factorization.

102201211200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34067070400010.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 102201211200021 its reverse (120002112102201), we get a palindrome (222203323302222).

The spelling of 102201211200021 in words is "one hundred two trillion, two hundred one billion, two hundred eleven million, two hundred thousand, twenty-one".