102121000001 has 4 divisors (see below), whose sum is σ = 102125321604. Its totient is φ = 102116678400.

The previous prime is 102120999989. The next prime is 102121000019. The reversal of 102121000001 is 100000121201.

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

It can be written as a sum of positive squares in 2 ways, for example, as 20499366976 + 81621633025 = 143176^2 + 285695^2 .

It is a cyclic number.

It is not a de Polignac number, because 102121000001 - 2¹⁴ = 102120983617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102121000021) 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, 2125160 + ... + 2172681.

It is an arithmetic number, because the mean of its divisors is an integer number (25531330401).

Almost surely, 2^102121000001 is an apocalyptic number.

It is an amenable number.

102121000001 is a deficient number, since it is larger than the sum of its proper divisors (4321603).

102121000001 is an equidigital number, since it uses as much as digits as its factorization.

102121000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4321602.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 102121000001 its reverse (100000121201), we get a palindrome (202121121202).

The spelling of 102121000001 in words is "one hundred two billion, one hundred twenty-one million, one", and thus it is an aban number.