102101300021 has 4 divisors (see below), whose sum is σ = 116687200032. Its totient is φ = 87515400012.

The previous prime is 102101300003. The next prime is 102101300039. The reversal of 102101300021 is 120003101201.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120003101201 = 17 ⋅7059005953.

It is an interprime number because it is at equal distance from previous prime (102101300003) and next prime (102101300039).

It is a cyclic number.

It is not a de Polignac number, because 102101300021 - 2¹⁰ = 102101298997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102101299975 and 102101300011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102101360021) 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, 7292949995 + ... + 7292950008.

It is an arithmetic number, because the mean of its divisors is an integer number (29171800008).

Almost surely, 2^102101300021 is an apocalyptic number.

It is an amenable number.

102101300021 is a deficient number, since it is larger than the sum of its proper divisors (14585900011).

102101300021 is an equidigital number, since it uses as much as digits as its factorization.

102101300021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14585900010.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 102101300021 its reverse (120003101201), we get a palindrome (222104401222).

The spelling of 102101300021 in words is "one hundred two billion, one hundred one million, three hundred thousand, twenty-one".