12202120021 has 16 divisors (see below), whose sum is σ = 15085364224. Its totient is φ = 9611115264.

The previous prime is 12202120013. The next prime is 12202120031. The reversal of 12202120021 is 12002120221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12202120021 - 2³ = 12202120013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 12202119983 and 12202120010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12202120031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 280356 + ... + 320941.

It is an arithmetic number, because the mean of its divisors is an integer number (942835264).

Almost surely, 2^12202120021 is an apocalyptic number.

It is an amenable number.

12202120021 is a deficient number, since it is larger than the sum of its proper divisors (2883244203).

12202120021 is a wasteful number, since it uses less digits than its factorization.

12202120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601540.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 12202120021 its reverse (12002120221), we get a palindrome (24204240242).

The spelling of 12202120021 in words is "twelve billion, two hundred two million, one hundred twenty thousand, twenty-one".