12102101001 has 16 divisors (see below), whose sum is σ = 17972891200. Its totient is φ = 8048333664.

The previous prime is 12102100999. The next prime is 12102101009. The reversal of 12102101001 is 10010120121.

It is a happy number.

It is not a de Polignac number, because 12102101001 - 2¹ = 12102100999 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12102101009) 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, 536911 + ... + 558996.

It is an arithmetic number, because the mean of its divisors is an integer number (1123305700).

Almost surely, 2^12102101001 is an apocalyptic number.

It is an amenable number.

12102101001 is a deficient number, since it is larger than the sum of its proper divisors (5870790199).

12102101001 is a wasteful number, since it uses less digits than its factorization.

12102101001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096325 (or 1096319 counting only the distinct ones).

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

Adding to 12102101001 its reverse (10010120121), we get a palindrome (22112221122).

The spelling of 12102101001 in words is "twelve billion, one hundred two million, one hundred one thousand, one".