12221121001 has 8 divisors (see below), whose sum is σ = 12823721280. Its totient is φ = 11624458032.

The previous prime is 12221120981. The next prime is 12221121013. The reversal of 12221121001 is 10012112221.

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 12221121001 - 2⁹ = 12221120489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12221121061) 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, 1480110 + ... + 1488343.

It is an arithmetic number, because the mean of its divisors is an integer number (1602965160).

Almost surely, 2^12221121001 is an apocalyptic number.

It is an amenable number.

12221121001 is a deficient number, since it is larger than the sum of its proper divisors (602600279).

12221121001 is a wasteful number, since it uses less digits than its factorization.

12221121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2968655.

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

Adding to 12221121001 its reverse (10012112221), we get a palindrome (22233233222).

The spelling of 12221121001 in words is "twelve billion, two hundred twenty-one million, one hundred twenty-one thousand, one".