1221142411221 has 8 divisors (see below), whose sum is σ = 1632441031680. Its totient is φ = 811969365792.

The previous prime is 1221142411189. The next prime is 1221142411253.

1221142411221 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (1221142411189) and next prime (1221142411253).

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

It is not a de Polignac number, because 1221142411221 - 2⁵ = 1221142411189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1221142411191 and 1221142411200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221142411121) 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, 531392416 + ... + 531394713.

It is an arithmetic number, because the mean of its divisors is an integer number (204055128960).

Almost surely, 2^{1221142411221} is an apocalyptic number.

It is an amenable number.

1221142411221 is a deficient number, since it is larger than the sum of its proper divisors (411298620459).

1221142411221 is a wasteful number, since it uses less digits than its factorization.

1221142411221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062787515.

The product of its digits is 512, while the sum is 24.

The spelling of 1221142411221 in words is "one trillion, two hundred twenty-one billion, one hundred forty-two million, four hundred eleven thousand, two hundred twenty-one".