102102011000221 has 4 divisors (see below), whose sum is σ = 102103909672572. Its totient is φ = 102100112327872.

The previous prime is 102102011000191. The next prime is 102102011000251. The reversal of 102102011000221 is 122000110201201.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (102102011000191) and next prime (102102011000251).

It can be written as a sum of positive squares in 2 ways, for example, as 9947022132100 + 92154988868121 = 3153890^2 + 9599739^2 .

It is a cyclic number.

It is not a de Polignac number, because 102102011000221 - 2²⁵ = 102101977445789 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 (102102011000251) 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, 949255510 + ... + 949363063.

It is an arithmetic number, because the mean of its divisors is an integer number (25525977418143).

Almost surely, 2^{102102011000221} is an apocalyptic number.

It is an amenable number.

102102011000221 is a deficient number, since it is larger than the sum of its proper divisors (1898672351).

102102011000221 is an equidigital number, since it uses as much as digits as its factorization.

102102011000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1898672350.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 102102011000221 its reverse (122000110201201), we get a palindrome (224102121201422).

The spelling of 102102011000221 in words is "one hundred two trillion, one hundred two billion, eleven million, two hundred twenty-one", and thus it is an aban number.