1221002243341 has 4 divisors (see below), whose sum is σ = 1292825904732. Its totient is φ = 1149178581952.

The previous prime is 1221002243327. The next prime is 1221002243413. The reversal of 1221002243341 is 1433422001221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 823656078025 + 397346165316 = 907555^2 + 630354^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221002243341 - 2¹¹ = 1221002241293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221002243441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35911830670 + ... + 35911830703.

It is an arithmetic number, because the mean of its divisors is an integer number (323206476183).

Almost surely, 2^{1221002243341} is an apocalyptic number.

It is an amenable number.

1221002243341 is a deficient number, since it is larger than the sum of its proper divisors (71823661391).

1221002243341 is an equidigital number, since it uses as much as digits as its factorization.

1221002243341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71823661390.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 1221002243341 its reverse (1433422001221), we get a palindrome (2654424244562).

The spelling of 1221002243341 in words is "one trillion, two hundred twenty-one billion, two million, two hundred forty-three thousand, three hundred forty-one".