102110020021 has 8 divisors (see below), whose sum is σ = 103804917120. Its totient is φ = 100425182208.

The previous prime is 102110020007. The next prime is 102110020031. The reversal of 102110020021 is 120020011201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 102110020021 - 2²¹ = 102107922869 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 (102110020031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2494351 + ... + 2534956.

It is an arithmetic number, because the mean of its divisors is an integer number (12975614640).

Almost surely, 2^102110020021 is an apocalyptic number.

It is an amenable number.

102110020021 is a deficient number, since it is larger than the sum of its proper divisors (1694897099).

102110020021 is an equidigital number, since it uses as much as digits as its factorization.

102110020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5029643.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 102110020021 its reverse (120020011201), we get a palindrome (222130031222).

The spelling of 102110020021 in words is "one hundred two billion, one hundred ten million, twenty thousand, twenty-one".