12221013212021 has 8 divisors (see below), whose sum is σ = 12314453689824. Its totient is φ = 12127575011760.

The previous prime is 12221013211987. The next prime is 12221013212063. The reversal of 12221013212021 is 12021231012221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12221013212021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12221013211984 and 12221013212002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221016212021) 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, 11116691 + ... + 12166463.

It is an arithmetic number, because the mean of its divisors is an integer number (1539306711228).

Almost surely, 2^{12221013212021} is an apocalyptic number.

It is an amenable number.

12221013212021 is a deficient number, since it is larger than the sum of its proper divisors (93440477803).

12221013212021 is a wasteful number, since it uses less digits than its factorization.

12221013212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138771.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 12221013212021 its reverse (12021231012221), we get a palindrome (24242244224242).

The spelling of 12221013212021 in words is "twelve trillion, two hundred twenty-one billion, thirteen million, two hundred twelve thousand, twenty-one".