12201001022221 has 16 divisors (see below), whose sum is σ = 13701125930688. Its totient is φ = 10770348326400.

The previous prime is 12201001022159. The next prime is 12201001022227. The reversal of 12201001022221 is 12222010010221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12201001022221 - 2¹³ = 12201001014029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12201001022195 and 12201001022204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12201001022227) 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, 107819535 + ... + 107932636.

It is an arithmetic number, because the mean of its divisors is an integer number (856320370668).

Almost surely, 2^{12201001022221} is an apocalyptic number.

12201001022221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12201001022221 is a deficient number, since it is larger than the sum of its proper divisors (1500124908467).

12201001022221 is a wasteful number, since it uses less digits than its factorization.

12201001022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215752332.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12201001022221 its reverse (12222010010221), we get a palindrome (24423011032442).

The spelling of 12201001022221 in words is "twelve trillion, two hundred one billion, one million, twenty-two thousand, two hundred twenty-one".