12221011021 has 8 divisors (see below), whose sum is σ = 12248863200. Its totient is φ = 12193190160.

The previous prime is 12221011013. The next prime is 12221011043. The reversal of 12221011021 is 12011012221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12221011021 - 2³ = 12221011013 is a prime.

It is a super-2 number, since 2×12221011021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12221010992 and 12221011010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221011001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 885786 + ... + 899476.

It is an arithmetic number, because the mean of its divisors is an integer number (1531107900).

Almost surely, 2^12221011021 is an apocalyptic number.

It is an amenable number.

12221011021 is a deficient number, since it is larger than the sum of its proper divisors (27852179).

12221011021 is a wasteful number, since it uses less digits than its factorization.

12221011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15659.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12221011021 its reverse (12011012221), we get a palindrome (24232023242).

The spelling of 12221011021 in words is "twelve billion, two hundred twenty-one million, eleven thousand, twenty-one".