102101200121 has 4 divisors (see below), whose sum is σ = 103499846772. Its totient is φ = 100702553472.

The previous prime is 102101200109. The next prime is 102101200141. The reversal of 102101200121 is 121002101201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121002101201 = 41 ⋅2951270761.

It can be written as a sum of positive squares in 2 ways, for example, as 88729515625 + 13371684496 = 297875^2 + 115636^2 .

It is a cyclic number.

It is not a de Polignac number, because 102101200121 - 2⁶ = 102101200057 is a prime.

It is a super-2 number, since 2×102101200121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102101200141) 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, 699323216 + ... + 699323361.

It is an arithmetic number, because the mean of its divisors is an integer number (25874961693).

Almost surely, 2^102101200121 is an apocalyptic number.

It is an amenable number.

102101200121 is a deficient number, since it is larger than the sum of its proper divisors (1398646651).

102101200121 is an equidigital number, since it uses as much as digits as its factorization.

102101200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398646650.

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

Adding to 102101200121 its reverse (121002101201), we get a palindrome (223103301322).

The spelling of 102101200121 in words is "one hundred two billion, one hundred one million, two hundred thousand, one hundred twenty-one".