102201110000021 has 4 divisors (see below), whose sum is σ = 102201328109100. Its totient is φ = 102200891890944.

The previous prime is 102201109999867. The next prime is 102201110000029. The reversal of 102201110000021 is 120000011102201.

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 32960171799025 + 69240938200996 = 5741095^2 + 8321114^2 .

It is a cyclic number.

It is not a de Polignac number, because 102201110000021 - 2⁴⁶ = 31832365822357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102201109999957 and 102201110000011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102201110000029) 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, 108350156 + ... + 109289333.

It is an arithmetic number, because the mean of its divisors is an integer number (25550332027275).

Almost surely, 2^{102201110000021} is an apocalyptic number.

It is an amenable number.

102201110000021 is a deficient number, since it is larger than the sum of its proper divisors (218109079).

102201110000021 is an equidigital number, since it uses as much as digits as its factorization.

102201110000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218109078.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 102201110000021 its reverse (120000011102201), we get a palindrome (222201121102222).

The spelling of 102201110000021 in words is "one hundred two trillion, two hundred one billion, one hundred ten million, twenty-one", and thus it is an aban number.