12221300021 has 16 divisors (see below), whose sum is σ = 14189750400. Its totient is φ = 10308798720.

The previous prime is 12221300011. The next prime is 12221300029. The reversal of 12221300021 is 12000312221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12221300021 - 2²² = 12217105717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12221299969 and 12221300005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221300029) 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, 479561 + ... + 504401.

It is an arithmetic number, because the mean of its divisors is an integer number (886859400).

Almost surely, 2^12221300021 is an apocalyptic number.

It is an amenable number.

12221300021 is a deficient number, since it is larger than the sum of its proper divisors (1968450379).

12221300021 is a wasteful number, since it uses less digits than its factorization.

12221300021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25964.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 12221300021 its reverse (12000312221), we get a palindrome (24221612242).

The spelling of 12221300021 in words is "twelve billion, two hundred twenty-one million, three hundred thousand, twenty-one".