12021100101 has 12 divisors (see below), whose sum is σ = 18277696320. Its totient is φ = 7592273640.

The previous prime is 12021100067. The next prime is 12021100109. The reversal of 12021100101 is 10100112021.

It is a happy number.

It is not a de Polignac number, because 12021100101 - 2⁷ = 12021099973 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 (12021100109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35149245 + ... + 35149586.

It is an arithmetic number, because the mean of its divisors is an integer number (1523141360).

Almost surely, 2^12021100101 is an apocalyptic number.

It is an amenable number.

12021100101 is a deficient number, since it is larger than the sum of its proper divisors (6256596219).

12021100101 is a wasteful number, since it uses less digits than its factorization.

12021100101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70298856 (or 70298853 counting only the distinct ones).

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

Adding to 12021100101 its reverse (10100112021), we get a palindrome (22121212122).

The spelling of 12021100101 in words is "twelve billion, twenty-one million, one hundred thousand, one hundred one".