102001313021 has 4 divisors (see below), whose sum is σ = 107369803200. Its totient is φ = 96632822844.

The previous prime is 102001313017. The next prime is 102001313027. The reversal of 102001313021 is 120313100201.

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: 120313100201 = 7 ⋅17187585743.

It is a cyclic number.

It is not a de Polignac number, because 102001313021 - 2² = 102001313017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102001312987 and 102001313005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102001313027) 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, 2684245061 + ... + 2684245098.

It is an arithmetic number, because the mean of its divisors is an integer number (26842450800).

Almost surely, 2^102001313021 is an apocalyptic number.

It is an amenable number.

102001313021 is a deficient number, since it is larger than the sum of its proper divisors (5368490179).

102001313021 is an equidigital number, since it uses as much as digits as its factorization.

102001313021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5368490178.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 102001313021 its reverse (120313100201), we get a palindrome (222314413222).

The spelling of 102001313021 in words is "one hundred two billion, one million, three hundred thirteen thousand, twenty-one".