1213221012441 has 32 divisors (see below), whose sum is σ = 1720991059200. Its totient is φ = 759133393920.

The previous prime is 1213221012431. The next prime is 1213221012449. The reversal of 1213221012441 is 1442101223121.

It is not a de Polignac number, because 1213221012441 - 2⁹ = 1213221011929 is a prime.

It is a super-3 number, since 3×1213221012441³ (a number of 37 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1213221012449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1092621 + ... + 1902698.

It is an arithmetic number, because the mean of its divisors is an integer number (53780970600).

Almost surely, 2^{1213221012441} is an apocalyptic number.

It is an amenable number.

1213221012441 is a deficient number, since it is larger than the sum of its proper divisors (507770046759).

1213221012441 is a wasteful number, since it uses less digits than its factorization.

1213221012441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2995489.

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 1213221012441 its reverse (1442101223121), we get a palindrome (2655322235562).

The spelling of 1213221012441 in words is "one trillion, two hundred thirteen billion, two hundred twenty-one million, twelve thousand, four hundred forty-one".