12102020001 has 16 divisors (see below), whose sum is σ = 17973645120. Its totient is φ = 8047886400.

The previous prime is 12102019981. The next prime is 12102020003. The reversal of 12102020001 is 10002020121.

It is not a de Polignac number, because 12102020001 - 2¹⁰ = 12102018977 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (12102020003) 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, 548055 + ... + 569708.

It is an arithmetic number, because the mean of its divisors is an integer number (1123352820).

Almost surely, 2^12102020001 is an apocalyptic number.

It is an amenable number.

12102020001 is a deficient number, since it is larger than the sum of its proper divisors (5871625119).

12102020001 is a wasteful number, since it uses less digits than its factorization.

12102020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118173 (or 1118167 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 12102020001 its reverse (10002020121), we get a palindrome (22104040122).

The spelling of 12102020001 in words is "twelve billion, one hundred two million, twenty thousand, one".