12021010101 has 24 divisors (see below), whose sum is σ = 17592041376. Its totient is φ = 7908821280.

The previous prime is 12021010073. The next prime is 12021010103. The reversal of 12021010101 is 10101012021.

It is a happy number.

It is not a de Polignac number, because 12021010101 - 2⁹ = 12021009589 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021010103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 717051 + ... + 733623.

It is an arithmetic number, because the mean of its divisors is an integer number (733001724).

Almost surely, 2^12021010101 is an apocalyptic number.

It is an amenable number.

12021010101 is a deficient number, since it is larger than the sum of its proper divisors (5571031275).

12021010101 is a wasteful number, since it uses less digits than its factorization.

12021010101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17633 (or 17630 counting only the distinct ones).

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

Adding to 12021010101 its reverse (10101012021), we get a palindrome (22122022122).

The spelling of 12021010101 in words is "twelve billion, twenty-one million, ten thousand, one hundred one".