102110200220021 has 4 divisors (see below), whose sum is σ = 116697371680032. Its totient is φ = 87523028760012.

The previous prime is 102110200220003. The next prime is 102110200220033. The reversal of 102110200220021 is 120022002011201.

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 a de Polignac number, because none of the positive numbers 2^k-102110200220021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102110200219978 and 102110200220005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102110200220221) 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, 7293585729995 + ... + 7293585730008.

It is an arithmetic number, because the mean of its divisors is an integer number (29174342920008).

Almost surely, 2^{102110200220021} is an apocalyptic number.

It is an amenable number.

102110200220021 is a deficient number, since it is larger than the sum of its proper divisors (14587171460011).

102110200220021 is an equidigital number, since it uses as much as digits as its factorization.

102110200220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14587171460010.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 102110200220021 its reverse (120022002011201), we get a palindrome (222132202231222).

The spelling of 102110200220021 in words is "one hundred two trillion, one hundred ten billion, two hundred million, two hundred twenty thousand, twenty-one".