102001120101 has 16 divisors (see below), whose sum is σ = 153025593600. Its totient is φ = 67139976384.

The previous prime is 102001120093. The next prime is 102001120129. The reversal of 102001120101 is 101021100201.

It is a happy number.

It is not a de Polignac number, because 102001120101 - 2³ = 102001120093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102001120901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23908116 + ... + 23912381.

It is an arithmetic number, because the mean of its divisors is an integer number (9564099600).

Almost surely, 2^102001120101 is an apocalyptic number.

It is an amenable number.

102001120101 is a deficient number, since it is larger than the sum of its proper divisors (51024473499).

102001120101 is an equidigital number, since it uses as much as digits as its factorization.

102001120101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47820585 (or 47820579 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 102001120101 its reverse (101021100201), we get a palindrome (203022220302).

The spelling of 102001120101 in words is "one hundred two billion, one million, one hundred twenty thousand, one hundred one".