1221450230253 has 32 divisors (see below), whose sum is σ = 1840634616960. Its totient is φ = 713690082560.

The previous prime is 1221450230233. The next prime is 1221450230309. The reversal of 1221450230253 is 3520320541221.

It is a cyclic number.

It is not a de Polignac number, because 1221450230253 - 2¹⁰ = 1221450229229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1221450230253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221450230213) 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, 294750 + ... + 1590527.

It is an arithmetic number, because the mean of its divisors is an integer number (57519831780).

Almost surely, 2^{1221450230253} is an apocalyptic number.

It is an amenable number.

1221450230253 is a deficient number, since it is larger than the sum of its proper divisors (619184386707).

1221450230253 is a wasteful number, since it uses less digits than its factorization.

1221450230253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1885997.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 1221450230253 its reverse (3520320541221), we get a palindrome (4741770771474).

The spelling of 1221450230253 in words is "one trillion, two hundred twenty-one billion, four hundred fifty million, two hundred thirty thousand, two hundred fifty-three".