12021020101 has 16 divisors (see below), whose sum is σ = 12512364480. Its totient is φ = 11540995200.

The previous prime is 12021019949. The next prime is 12021020129. The reversal of 12021020101 is 10102012021.

It is a cyclic number.

It is not a de Polignac number, because 12021020101 - 2²³ = 12012631493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021020801) 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, 593721 + ... + 613633.

It is an arithmetic number, because the mean of its divisors is an integer number (782022780).

Almost surely, 2^12021020101 is an apocalyptic number.

It is an amenable number.

12021020101 is a deficient number, since it is larger than the sum of its proper divisors (491344379).

12021020101 is a wasteful number, since it uses less digits than its factorization.

12021020101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20196.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 12021020101 its reverse (10102012021), we get a palindrome (22123032122).

The spelling of 12021020101 in words is "twelve billion, twenty-one million, twenty thousand, one hundred one".